JEE Main 2022 — Calculus

A water tank has the shape of a right circular cone with axis vertical and vertex downwards. Its semivertical angle is ${\mathrm{tan}}^{-1}\frac{3}{4}$. Water is poured in it at a constant rate of $6$ cubic meter per hour. The rate (in square meter per hour), at which the wet curved surface area of the tank is increasing, when the depth of water in the tank is $4$ meters, is _______.

A wire of length $22m$ is to be cut into two pieces. One of the pieces is to be made into a square and the other into an equilateral triangle. Then, the length of the side of the equilateral triangle, so that the combined area of the square and the equilateral triangle is minimum, is

$f,g:R\rightarrow R$ be two real valued function defined as $f(x)={\begin{matrix}-|x+3| & , & x<0 \\ {e}^{x} & , & x\geq 0\end{matrix}$ and $g(x)={\begin{matrix}{x}^{2}+{k}_{1}x & , & x<0 \\ 4x+{k}_{2} & , & x\geq 0\end{matrix}$, where ${k}_{1}$ and ${k}_{2}$ are real constants. If $gof$ is differentiable at $x=0$, then $gof(-4)+$$gof(4)$ is equal to

Consider a cuboid of sides $2x,4x$ and $5x$ and a closed hemisphere of radius $r$. If the sum of their surface areas is constant $k$, then the ratio $x:r$, for which the sum of their volumes is maximum, is

Consider a curve $y=y(x)$ in the first quadrant as shown in the figure. Let the area ${A}_{1}$ is twice the area ${A}_{2}$. Then the normal to the curve perpendicular to the line $2x-12y=15$ does NOT pass through the point __ 

For any real number $x$, let $[x]$ denote the largest integer less than or equal to $x$. Let $f$ be a real-valued function defined on the interval $[-10,10]$ by $f(x)={\begin{matrix}x-[x], & \text{if}[x]\text{is odd} \\ 1+[x]-x, & \text{if}[x]\text{is even}\end{matrix}$ Then, the value of $\frac{{\pi }^{2}}{10}{\int }_{-10}^{10}f(x)cos\pi xdx$ is

For $I(x)=\int \frac{{\mathrm{sec}}^{2}x-2022}{{\mathrm{sin}}^{2022}x}dx$, if $I(\frac{\pi }{4})={2}^{1011}$, then

For real numbers $a,b(a>b>0)$, let Area ${(x,y):{x}^{2}+{y}^{2}\leq {a}^{2}$ and $\frac{{x}^{2}}{{a}^{2}}+\frac{{y}^{2}}{{b}^{2}}\geq 1}=30\pi$ and Area ${(x,y):{x}^{2}+{y}^{2}\geq {b}^{2}$ and $\frac{{x}^{2}}{{a}^{2}}+\frac{{y}^{2}}{{b}^{2}}\leq 1}=18\pi$ Then the value of $(a-b){}^{2}$ is equal to _____.

For the curve $C:({x}^{2}+{y}^{2}-3)+{({x}^{2}-{y}^{2}-1)}^{5}=0$, the value of $3{y}^{'}-{y}^{3}{y}^{''}$, at the point $(\alpha ,\alpha ),\alpha >0$, on $C$, is equal to ________.

For the function $f(x)=4{\mathrm{log}}_{e}(x-1)-2{x}^{2}+4x+5,x>1$, which one of the following is NOT correct?

If $f(x)={\begin{matrix}x+a, & x\leq 0 \\ |x-4|, & x>0\end{matrix}$ and $g(x)={\begin{matrix}x+1, & x<0 \\ {(x-4)}^{2}+b, & x\geq 0\end{matrix}$ are continuous on $R$, then $(gof)(2)+(fog)(-2)$ is equal to:

If $m$ and $n$ respectively are the number of local maximum and local minimum points of the function $f(x)={\int }_{0}^{{x}^{2}}\frac{{t}^{2}-5t+4}{2+{e}^{t}}dt$, then the ordered pair $(m,n)$ is equal to

If $\frac{dy}{dx}+2y\mathrm{tan}x=\mathrm{sin}x,0<x<\frac{\pi }{2}$ and $y(\frac{\pi }{3})=0$, then the maximum value of $y(x)$ is

If $\frac{dy}{dx}+{e}^{x}({x}^{2}-2)y=({x}^{2}-2x)({x}^{2}-2){e}^{2x}$ and $y(0)=0$, then the value of $y(2)$ is

If $y=y(x),x\in (0,\frac{\pi }{2})$ be the solution curve of the differential equation $({\mathrm{sin}}^{2}2x)\frac{dy}{dx}+(8{\mathrm{sin}}^{2}2x+2\mathrm{sin}4x)y=$ $2{e}^{-4x}(2\mathrm{sin}2x+\mathrm{cos}2x),$ with $y(\frac{\pi }{4})={e}^{-\pi }$, then $y(\frac{\pi }{6})$ is equal to

If $[t]$ denotes the greatest integer $\leq t$, then number of points, at which the function $f(x)=4|2x+3|+$ $9[x+\frac{1}{2}]-12[x+20]$ is not differentiable in the open interval $(-20,20)$, is ______.

If $[t]$ denotes the greatest integer $\leq t$, then the value of ${\int }_{0}^{1}[2x-|3{x}^{2}-5x+2|+1]dx$ is

If for $p\neq q\neq 0$, then function $f(x)=\frac{\sqrt[7]{p(729+x)}-3}{\sqrt[3]{729+qx}-9}$ is continuous at $x=0$, then

If $y=y(x)$ is the solution of the differential equation $(1+{e}^{2x})\frac{dy}{dx}+2(1+{y}^{2}){e}^{x}=0$ and $y(0)=0$, then $6(y'(0)+{(y({\mathrm{log}}_{c}\sqrt{3}))}^{2})$ is equal to:

If $y=y(x)$ is the solution of the differential equation $2{x}^{2}\frac{dy}{dx}-2xy+3{y}^{2}=0$ such that $y(e)=\frac{e}{3}$, then $y(1)$ is equal to

If $y=y(x)$ is the solution of the differential equation $x\frac{dy}{dx}+2y=x{e}^{x},y(1)=0$ then the local maximum value of the function $z(x)={x}^{2}y(x)-{e}^{x},x\in R$ is

If $x=x(y)$ is the solution of the differential equation $y\frac{dx}{dy}=2x+{y}^{3}(y+1){e}^{y},x(1)=0$; then $x(e)$ is equal to

If the absolute maximum value of the function $f(x)=({x}^{2}-2x+7){e}^{(4{x}^{3}-12{x}^{2}-180x+31)}$in the interval $[-3,0]$ is $f(\alpha )$, then

If the area of the region ${(x,y):{x}^{\frac{2}{3}}+{y}^{\frac{2}{3}}\leq 1,x+y\geq 0,y\geq 0}$ is $A$, then $\frac{256A}{\pi }$ is

If the function $f(x)={\begin{matrix}\frac{{\mathrm{log}}_{e}(1-x+{x}^{2})+{\mathrm{log}}_{e}(1+x+{x}^{2})}{secx-\mathrm{cos}x}, & x\in (\frac{-\pi }{2},\frac{\pi }{2})-{0} \\ k & ,x=0\end{matrix}$ is continuous at $x=0$, then $k$ is equal to:

If the maximum value of $a$, for which the function ${f}_{a}(x)={\mathrm{tan}}^{-1}2x-3ax+7$ is non-decreasing in $(-\frac{\pi }{6},\frac{\pi }{6})$, is $\bar{a}$, then ${f}_{\bar{a}}(\frac{\pi }{8})$ is equal to

If the solution curve $y=y(x)$ of the differential equation ${y}^{2}dx+({x}^{2}-xy+{y}^{2})dy=0$, which passes through the point $(1,1)$ and intersects the line $y=\sqrt{3}x$ at the point $(\alpha ,\sqrt{3}\alpha )$, then value of ${\mathrm{log}}_{e}(\sqrt{3}\alpha )$ is equal to

If the solution curve of the differential equation $\frac{dy}{dx}=\frac{x+y-2}{x-y}$ passes through the point $(2,1)$ and $(k+1,2),k>0$, then

If the solution curve of the differential equation $(({\mathrm{tan}}^{-1}y)-x)dy=(1+{y}^{2})dx$ passes through the point $(1,0)$ then the abscissa of the point on the curve whose ordinate is $\mathrm{tan}(1)$ is

If the sum of all the roots of the equation ${e}^{2x}-11{e}^{x}-45{e}^{-x}+\frac{81}{2}=0$ is ${\mathrm{log}}_{e}P$, then $P$ is equal to _____.

If $y(x)={({x}^{x})}^{x},x>0$ then $\frac{{d}^{2}x}{d{y}^{2}}+20$ at $x=1$ is equal to

If ${\int }_{0}^{2}(\sqrt{2x}-\sqrt{2x-{x}^{2}})dx=$ ${\int }_{0}^{1}(1-\sqrt{1-{y}^{2}}-\frac{{y}^{2}}{2})dy+{\int }_{1}^{2}(2-\frac{{y}^{2}}{2})dy+I$, then $I$ equal to

If ${b}_{n}={\int }_{0}^{\frac{\pi }{2}}\frac{{\mathrm{cos}}^{2}nx}{\mathrm{sin}x}dx,n\in \mathbb{N}$, then

If $f(\alpha )={\int }_{1}^{\alpha }\frac{{\mathrm{log}}_{10}t}{1+t}dt,\alpha >0$, then $f({e}^{3})+f({e}^{-3})$ is equal to

If $\underset{n\rightarrow \infty }{\mathrm{lim}}(\sqrt{{n}^{2}-n-1}+n\alpha +\beta )=0$ then $8(\alpha +\beta )$ is equal to

If $n(2n+1){\int }_{0}^{1}{(1-{x}^{n})}^{2n}dx=1177{\int }_{0}^{1}{(1-{x}^{n})}^{2n+1}dx$, then $n\in N$ is equal to _______.

If $\int \frac{1}{x}\sqrt{\frac{1-x}{1+x}}dx=g(x)+c,g(1)=0$, then $g(\frac{1}{2})$ is equal to

If $\frac{dy}{dx}+\frac{{2}^{x-y}({2}^{y}-1)}{{2}^{x}-1}=0,x,y>0,y(1)=1$, then $y(2)$ is equal to

If $f(\theta )=\mathrm{sin}\theta +{\int }_{-\frac{\pi }{2}}^{\frac{\pi }{2}}(\mathrm{sin}\theta +t\mathrm{cos}\theta )\cdot f(t)dt$, then $|{\int }_{0}^{\frac{\pi }{2}}f(\theta )d\theta |$ is

If ${\mathrm{cos}}^{-1}(\frac{y}{2})={\mathrm{log}}_{e}{(\frac{x}{5})}^{5},|y|<2$, then

If $y={\mathrm{tan}}^{-1}(\mathrm{sec}{x}^{3}-\mathrm{tan}{x}^{3}),\frac{\pi }{2}<{x}^{3}<\frac{3\pi }{2}$, then

If $\underset{x\rightarrow 1}{\mathrm{lim}}(\frac{\mathrm{sin}(3{x}^{2}-4x+1)-{x}^{2}+1}{2{x}^{3}-7{x}^{2}+ax+b})=-2$, then the value of $(a-b)$ is equal to

If ${\int }_{0}^{\sqrt{3}}\frac{15{x}^{3}}{\sqrt{1+{x}^{2}+\sqrt{{(1+{x}^{2})}^{3}}}}dx=\alpha \sqrt{2}+\beta \sqrt{3}$, where $\alpha ,\beta$ are integers, then $\alpha +\beta$ is equal to

If $\underset{x\rightarrow 0}{\mathrm{lim}}\frac{\alpha {e}^{x}+\beta {e}^{-x}+\gamma \mathrm{sin}x}{x{\mathrm{sin}}^{2}x}=\frac{2}{3}$, where $\alpha ,\beta ,\gamma \in R$, then which of the following is NOT correct?

∫ eˣ dx is equal to:

$\underset{x\rightarrow \frac{\pi }{4}}{\mathrm{lim}}\frac{8\sqrt{2}-{(\mathrm{cos}x+\mathrm{sin}x)}^{7}}{\sqrt{2}-\sqrt{2}\mathrm{sin}2x}$ is equal to

$\underset{x\rightarrow \frac{\pi }{2}}{\mathrm{lim}}({\mathrm{tan}}^{2}x({(2{\mathrm{sin}}^{2}x+3\mathrm{sin}x+4)}^{\frac{1}{2}}-{({\mathrm{sin}}^{2}x+6\mathrm{sin}x+2)}^{\frac{1}{2}}))$ is equal to

$\underset{x\rightarrow \frac{1}{\sqrt{2}}}{\mathrm{lim}}\frac{\mathrm{sin}({\mathrm{cos}}^{-1}x)-x}{1-\mathrm{tan}({\mathrm{cos}}^{-1}x)}$ is equal to

$\underset{x\rightarrow 0}{\mathrm{lim}}{(\frac{{(x+2\mathrm{cos}x)}^{3}+2{(x+2\mathrm{cos}x)}^{2}+3\mathrm{sin}(x+2\mathrm{cos}x)}{{(x+2)}^{3}+2{(x+2)}^{2}+3\mathrm{sin}(x+2)})}^{\frac{100}{x}}$ is equal to

${\int }_{0}^{20\pi }{(|\mathrm{sin}x|+|\mathrm{cos}x|)}^{2}dx$ is equal to:

$\underset{x\rightarrow 0}{\mathrm{lim}}\frac{\mathrm{cos}(\mathrm{sin}x)-\mathrm{cos}x}{{x}^{4}}$ is equal to

Let a curve $y=y(x)$ pass through the point $(3,3)$ and the area of the region under this curve, above the $x$-axis and between the abscissae $3$ and $x(>3)$ be ${(\frac{y}{x})}^{3}$. If this curve also passes through the point $(\alpha ,6\sqrt{10})$ in the first quadrant, then $\alpha$ is equal to _______.

Let a function $f:\mathbb{R}\rightarrow \mathbb{R}$ be defined as: $f(x)={\begin{matrix}{\int }_{0}^{x}(5-|t-3|)dt, & x>4 \\ {x}^{2}+bx, & x\leq 4\end{matrix}$ where $b\in \mathbb{R}$. If $f$ is continuous at $x=4$, then which of the following statements is NOT true?

Let a smooth curve $y=f(x)$ be such that the slope of the tangent at any point $(x,y)$ on it is directly proportional to $(\frac{-y}{x})$. If the curve passes through the points $(1,2)$ and $(8,1)$, then $|y(\frac{1}{8})|$ is equal to

Let $P$ and $Q$ be any points on the curves ${(x-1)}^{2}+{(y+1)}^{2}=1$ and $y={x}^{2}$, respectively. The distance between $P$ and $Q$ is minimum for some value of the abscissa of $P$ in the interval

Let $y={y}_{1}(x)$ and $y={y}_{2}(x)$ be two distinct solutions of the differential equation $\frac{dy}{dx}=x+y$, with ${y}_{1}(0)=0$ and ${y}_{2}(0)=1$ respectively. Then, the number of points of intersection of $y={y}_{1}(x)$ and $y={y}_{2}(x)$ is

Let $f:R\rightarrow R$ and $g:R\rightarrow R$ be two functions defined by $f(x)={\mathrm{log}}_{e}({x}^{2}+1)-{e}^{-x}+1$ and $g(x)=\frac{1-2{e}^{2x}}{{e}^{x}}\cdot$ Then, for which of the following range of $\alpha$, the inequality $f(g(\frac{{(\alpha -1)}^{2}}{3}))>f(g(\alpha -\frac{5}{3}))$ holds?

Let ${A}_{1}={(x,y):|x|\leq {y}^{2},|x|+2y\leq 8}$ and ${A}_{2}={(x,y):|x|+|y|\leq k}.$ If $27$ (Area ${A}_{1}$) $=5$(Area ${A}_{2}$), then $k$ is equal to

Let $\underset{0\leqslant x\leqslant 2}{Max}{\frac{9-{x}^{2}}{5-x}}=\alpha$ and $\underset{0\leqslant x\leqslant 2}{\mathrm{Min}}{\frac{9-{x}^{2}}{5-x}}=\beta$. If ${\int }_{\beta -\frac{8}{3}}^{2\alpha -1}Max{\frac{9-{x}^{2}}{5-x},x}dx={\alpha }_{1}+{\alpha }_{2}{\mathrm{log}}_{e}(\frac{8}{15})$, then ${\alpha }_{1}+{\alpha }_{2}$ is equal to ______

Let $x(t)=2\sqrt{2}\mathrm{cos}t\sqrt{\mathrm{sin}2t}$ and $y(t)=2\sqrt{2}\mathrm{sin}t\sqrt{\mathrm{sin}2t},t\in (0,\frac{\pi }{2})$. Then $\frac{1+{(\frac{dy}{dx})}^{2}}{\frac{{d}^{2}y}{{\mathrm{dx}}^{2}}}$ at $t=\frac{\pi }{4}$ is equal to

Let $f(x)=[2{x}^{2}+1]$ and $g(x)={\begin{matrix}2x-3, & x<0 \\ 2x+3, & x\geq 0\end{matrix}$, where $[t]$ is the greatest integer $\leq t$. Then, in the open interval $(-1,1)$, the number of points where fog is discontinuous is equal to ______.

Let $f$ be a differentiable function in $(0,\frac{\pi }{2})$. If ${\int }_{\mathrm{cos}x}^{1}{t}^{2}f(t)dt={\mathrm{sin}}^{3}x+\mathrm{cos}x$, then $\frac{1}{\sqrt{3}}{f}^{'}(\frac{1}{\sqrt{3}})$ is equal to

Let $f$ be a differentiable function satisfying $f(x)=\frac{2}{\sqrt{3}}{\int }_{0}^{\sqrt{3}}f(\frac{{\lambda }^{2}x}{3})d\lambda ,x>0$ and $f(1)=\sqrt{3}$. If $y=f(x)$ passes through the point $(\alpha ,6)$, then $\alpha$ is equal to _______.

Let $f:R\rightarrow R$ be a differentiable function such that $f(\frac{\pi }{4})=\sqrt{2},f(\frac{\pi }{2})=0$ and ${f}^{'}(\frac{\pi }{2})=1$ and let $g(x)={\int }_{x}^{\frac{\pi }{4}}({f}^{'}(t)\mathrm{sec}t+\mathrm{tan}t\mathrm{sec}tf(t))dt$ for $x\in [\frac{\pi }{4},\frac{\pi }{2}).$ Then $\underset{x\rightarrow {(\frac{\pi }{2})}^{-}}{\mathrm{lim}}g(x)$ is equal to

Let $g:(0,\infty )\rightarrow R$ be a differentiable function such that $\int (\frac{x(\mathrm{cos}x-\mathrm{sin}x)}{{e}^{x}+1}+\frac{g(x)({e}^{x}+1-x{e}^{x})}{{({e}^{x}+1)}^{2}})dx=\frac{xg(x)}{{e}^{x}+1}+C$, for all $x>0$, where $C$ is an arbitrary constant. Then

Let $f:\mathbb{R}\rightarrow \mathbb{R}$ be a function defined as $f(x)=a\mathrm{sin}(\frac{\pi [x]}{2})+[2-x],a\in \mathbb{R}$, where $[t]$ is the greatest integer less than or equal to $t$. If $\underset{x\rightarrow -1}{\mathrm{lim}}f(x)$ exists, then the value of ${\int }_{0}^{4}f(x)dx$ is equal to

Let $f:R\rightarrow R$ be a function defined by $f(x)={(x-3)}^{{n}_{1}}{(x-5)}^{{n}_{2}},{n}_{1},{n}_{2}\in N$. The, which of the following is NOT true?

Let $f:R\rightarrow R$ be a function defined by : $f(x)={\begin{matrix}\underset{t\leq x}{\mathrm{max}}{{t}^{3}-3t}; & x\leq 2 \\ {x}^{2}+2x-6; & 2<x<3 \\ [x-3]+9; & 3\leq x\leq 5 \\ 2x+1; & x>5\end{matrix}$ Where $[t]$ is the greatest integer less than or equal to $t$. Let $m$ be the number of points where $f$ is not differentiable and $I={\int }_{-2}^{2}f(x)dx$. Then the ordered pair $(m,I)$ is equal to

Let $f(x)$ be a polynomial function such that $f(x)+{f}^{'}(x)+{f}^{''}(x)={x}^{5}+64$. Then, the value of $\underset{x\rightarrow 1}{\mathrm{lim}}\frac{f(x)}{x-1}$ is equal to

Let $f$ be a real valued continuous function on $[0,1]$ and $f(x)=x+{\int }_{0}^{1}(x-t)f(t)dt$. Then which of the following points $(x,y)$ lies on the curve $y=f(x)$?

Let $f:[0,1]\rightarrow R$ be a twice differentiable function in $(0,1)$ such that $f(0)=3$ and $f(1)=5$. If the line $y=2x+3$ intersects the graph of $f$ at only two distinct points in $(0,1)$, then the least number of points $x\in (0,1)$, at which ${f}^{''}(x)=0$, is

Let $f$ be a twice differentiable function on $R$. If ${f}^{'}(0)=4$ and $f(x)+{\int }_{0}^{x}(x-t){f}^{'}(t)dt$ $=({e}^{2x}+{e}^{-2x})\mathrm{cos}2x+\frac{2}{a}x$, then ${(2a+1)}^{5}{a}^{2}$ is equal to _______.

Let $a$ be an integer such that $\underset{x\rightarrow 7}{\mathrm{lim}}\frac{18-[1-x]}{[x-3a]}$ exists, where $[t]$ is greatest integer $\leq t$. Then $a$ is equal to

Let $f:R\rightarrow R$ be continuous function satisfying $f(x)+f(x+k)=n$, for all $x\in R$ where $k>0$ and $n$ is a positive integer. If ${I}_{1}={\int }_{0}^{4nk}f(x)dx$ and ${I}_{2}={\int }_{-k}^{3k}f(x)dx$, then

Let $f:R\rightarrow R$ be defined as $f(x)={x}^{3}+x-5$. If $g(x)$ is a function such that $f(g(x))=x,\forall x\in R$, then ${g}^{'}(63)$ is equal to ______

Let $f:\mathbb{R}\rightarrow \mathbb{R}$ be defined as $f(x)=[\begin{matrix}[{e}^{x}], & x<0 \\ a{e}^{x}+[x-1], & 0\leq x<1 \\ b+[\mathrm{sin}(\pi x)], & 1\leq x<2 \\ [{e}^{-x}]-c, & x\geq 2\end{matrix}$ where $a,b,c\in \mathbb{R}$ and $[t]$ denotes greatest integer less than or equal to $t$. Then, which of the following statements is true?

Let $f,g:R\rightarrow R$ be functions defined by $f(x)={\begin{matrix}[x] & ,x<0 \\ |1-x| & ,x\geq 0\end{matrix}$ and $g(x)={\begin{matrix}{e}^{x}-x, & x<0 \\ {(x-1)}^{2}-1, & x\geq 0\end{matrix}$ where $[x]$ denote the greatest integer less than or equal to $x$. Then, the function fog is discontinuous at exactly

Let ${\lambda }^{*}$ be the largest value of $\lambda$ for which the function ${f}_{\lambda }(x)=4\lambda {x}^{3}-36\lambda {x}^{2}+36x+48$ is increasing for all $x\in \mathbb{R}$. Then ${f}_{{\lambda }^{*}}(1)+{f}_{\lambda ,*}(-1)$ is equal to:

Let $S$ be the region bounded by the curves $y={x}^{3}$ and ${y}^{2}=x$. The curve $y=2|x|$ divides $S$ into two regions of areas ${R}_{1}$ and ${R}_{2}$. If $\mathrm{max}|{R}_{1},{R}_{2}|={R}_{2}$, then $\frac{{R}_{2}}{{R}_{1}}$ is equal to ______

Let $y=y(x)$ be the solution curve of the differential equation $\frac{dy}{dx}+\frac{1}{{x}^{2}-1}y={(\frac{x-1}{x+1})}^{\frac{1}{2}}$, $x>1$ passing through the point $(2,\sqrt{\frac{1}{3}})$. Then $\sqrt{7}y(8)$ is equal to

Let $y=y(x)$ be the solution curve of the differential equation $\mathrm{sin}(2{x}^{2}){\mathrm{log}}_{e}(\mathrm{tan}{x}^{2})dy+(4xy-4\sqrt{2}x\mathrm{sin}({x}^{2}-\frac{\pi }{4}))dx=0,0<x<\sqrt{\frac{\pi }{2}}$ , which passes through the point $(\sqrt{\frac{\pi }{6}},1)$. Then $|y(\sqrt{\frac{\pi }{3}})|$ is equal to _______.

Let $y=y(x)$ be the solution curve of the differential equation $\frac{dy}{dx}+(\frac{2{x}^{2}+11x+13}{{x}^{3}+6{x}^{2}+11x+6})y=\frac{(x+3)}{x+1},x>-1$, which passes through the point $(0,1)$. Then $y(1)$ is equal to

Let $y=y(x),x>1$, be the solution of the differential equation $(x-1)\frac{dy}{dx}+2xy=\frac{1}{x-1}$, with $y(2)=\frac{1+{e}^{4}}{2{e}^{4}}$. If $y(3)=\frac{{e}^{\alpha }+1}{\beta {e}^{\alpha }}$. then the value of $\alpha +\beta$ is equal to ______.

Let $y=y(x)$ be the solution of the differential equation $x(1-{x}^{2})\frac{dy}{dx}+(3{x}^{2}y-y-4{x}^{3})=0,x>1$ with $y(2)=-2$. Then $y(3)$ is equal to

Let $y=y(x)$ be the solution of the differential equation $(x+1){y}^{'}-y={e}^{3x}{(x+1)}^{2}$, with $y(0)=\frac{1}{3}$. Then, the point $x=-\frac{4}{3}$ for the curve $y=y(x)$ is

Let $y=y(x)$ be the solution of the differential equation $\frac{dy}{dx}+\frac{\sqrt{2}y}{2{\mathrm{cos}}^{4}x-\mathrm{cos}2x}=x{e}^{{\mathrm{tan}}^{-1}(\sqrt{2}\mathrm{cot}2x)},0<x<\frac{\pi }{2}$ with $y(\frac{\pi }{4})=\frac{{\pi }^{2}}{32}$. If $y(\frac{\pi }{3})=\frac{{\pi }^{2}}{18}{e}^{-{\mathrm{tan}}^{-1}(\alpha )}$, then the value of $3{\alpha }^{2}$ is equal to ______.

Let $y=y(x)$ be the solution of the differential equation $\frac{dy}{dx}=\frac{4{y}^{3}+2y{x}^{2}}{3x{y}^{2}+{x}^{3}},y(1)=1$. If for some $n\in N,y(2)\in [n-1,n)$, then $n$ is equal to _______.

Let $y=y(x)$ be the solution of the differential equation $(1-{x}^{2})dy=(xy+({x}^{3}+2)\sqrt{1-{x}^{2}})dx,-1<x<1$ and $y(0)=0$. If ${\int }_{-\frac{1}{2}}^{\frac{1}{2}}\sqrt{1-{x}^{2}}y(x)dx=k$ then ${k}^{-1}$ is equal to

Let $x=x(y)$ be the solution of the differential equation $2y{e}^{\frac{x}{{y}^{2}}}dx+({y}^{2}-4x{e}^{\frac{x}{{y}^{2}}})dy=0$ such that $x(1)=0$. Then, $x(e)$ is equal to

Let $f(x)=2+|x|-|x-1|+|x+1|,x\in R$. Consider $(S1):{f}^{'}(-\frac{3}{2})+{f}^{'}(-\frac{1}{2})+{f}^{'}(\frac{1}{2})+{f}^{'}(\frac{3}{2})=2$ $(S2):{\int }_{-2}^{2}f(x)dx=12$ Then,

Let $[t]$ denote the greatest integer $\leq t$ and ${t}$ denote the fractional part of $t$. Then integral value of $\alpha$ for which the left hand limit of the function $f(x)=[1+x]+\frac{{\alpha }^{2[x]+{x}}+[x]-1}{2[x]+{x}}$ at $x=0$ is equal to $\alpha -\frac{4}{3}$ is _____

Let $[t]$ denote the greatest integer less than or equal to $t$. Then the value of the integral ${\int }_{-3}^{101}([\mathrm{sin}(\pi x)]+{e}^{[\mathrm{cos}(2\pi x)]})dx$ is equal to

Let $[t]$ denote the greatest integer less than or equal to $t$. Then, the value of the integral ${\int }_{0}^{1}[-8{x}^{2}+6x-1]dx$ is equal to

Let ${a}_{n}={\int }_{-1}^{n}(1+\frac{x}{2}+\frac{{x}^{2}}{3}+\ldots +\frac{{x}^{n-1}}{n})dx$ for every $n\in N$. Then the sum of all the elements of the set ${n\in N:{a}_{n}\in (2,30)}$ is _________.

Let $\beta =\underset{x\rightarrow 0}{\mathrm{lim}}\frac{\alpha x-({e}^{3x}-1)}{\alpha x({e}^{3x}-1)}$ for some $\alpha \in \mathbb{R}$. Then the value of $\alpha +\beta$ is:

Let $f(x)=|(x-1)({x}^{2}-2x-3)|+x-3,x\in \mathbb{R}$. If $m$ and $M$ are respectively the number of points of local minimum and local maximum of $f$ in the interval $(0,4)$, then $m+M$ is equal to _____.

Let $f(x)=\mathrm{min}{1,1+x\mathrm{sin}x},0\leq x\leq 2\pi$. If $m$ is the number of points, where $f$ is not differentiable and $n$ is the number of points, where $f$ is not continuous, then the ordered pair $(m,n)$ is equal to

Let $f(x)=2{\mathrm{cos}}^{-1}x+4{\mathrm{cot}}^{-1}x-3{x}^{2}-2x+10,x\in [-1,1]$. If $[a,b]$ is the range of the function, then $4a-b$ is equal to

Let $S=(0,2\pi )-{\frac{\pi }{2},\frac{3\pi }{4},\frac{3\pi }{2},\frac{7\pi }{4}}$. Let $y=y(x)$, $x\in S$, be the solution curve of the differential equation $\frac{dy}{dx}=\frac{1}{1+\mathrm{sin}2x},y(\frac{\pi }{4})=\frac{1}{2}$. If the sum of abscissas of all the points of intersection of the curve $y=y(x)$ with the curve $y=\sqrt{2}\mathrm{sin}x$ is $\frac{k\pi }{12}$, then $k$ is equal to _____.

Let $f:\mathbb{R}\rightarrow \mathbb{R}$ satisfy $f(x+y)={2}^{x}f(y)+{4}^{y}(f(x),\forall x$, $y\in \mathbb{R}$. If $f(2)=3$, then $14\cdot \frac{{f}^{'}(4)}{{f}^{'}(2)}$ is equal to _____.

Let the function $f(x)={\begin{matrix}\frac{{\mathrm{log}}_{e}(1+5x)-{\mathrm{log}}_{e}(1+\alpha x)}{x} & \mathrm{if}x\neq 0 \\ 10 & \mathrm{if}x=0\end{matrix}$ be continuous at $x=0$. Then $\alpha$ is equal to

Let the function $f(x)=2{x}^{2}-{\mathrm{log}}_{e}x,x>0$, be decreasing in $(0,a)$ and increasing in $(a,4)$. A tangent to the parabola ${y}^{2}=4ax$ at a point $P$ on it passes through the point $(8a,8a-1)$ but does not pass through the point $(-\frac{1}{a},0)$. If the equation of the normal at $P$ is $\frac{x}{\alpha }+\frac{y}{\beta }=1$, then $\alpha +\beta$ is equal to

Let the slope of the tangent to a curve $y=f(x)$ at $(x,y)$ be given by $2\mathrm{tan}x(\mathrm{cos}x-y)$. if the curve passes through the point $(\frac{\pi }{4},0)$, then the value of ${\int }_{0}^{\frac{\pi }{2}}ydx$ is equal to

Let the solution curve $y=y(x)$ of the differential equation $(4+{x}^{2})dy-2x({x}^{2}+3y+4)dx=0$ pass through the origin. Then $y(2)$ is equal to _____.

Let the solution curve $y=f(x)$ of the differential equation $\frac{dy}{dx}+\frac{xy}{{x}^{2}-1}=\frac{{x}^{4}+2x}{\sqrt{1-{x}^{2}}},x\in (-1,1)$ pass through the origin. Then ${\int }_{-\frac{\sqrt{3}}{2}}^{\frac{\sqrt{3}}{2}}f(x)dx$ is equal to

Let the solution curve of the differential equation $x\frac{dy}{dx}-y=\sqrt{{y}^{2}+16{x}^{2}},y(1)=3$ be $y=y(x)$. Then $y(2)$ is equal to

Let the solution curve of the differential equation $xdy=(\sqrt{{x}^{2}+{y}^{2}}+y)dx,x>0$, intersect the line $x=1$ at $y=0$ and the line $x=2$ at $y=\alpha$. Then the value of $\alpha$ is

Let the solution curve $y=y(x)$ of the differential equation $(1+{e}^{2x})(\frac{dy}{dx}+y)=1$ pass through the point $(0,\frac{\pi }{2})$. Then, $\underset{x\rightarrow \infty }{\mathrm{lim}}{e}^{x}y(x)$ is equal to

Let the solution curve $y=y(x)$ of the differential equation, $[\frac{x}{\sqrt{{x}^{2}-{y}^{2}}}+{e}^{\frac{y}{x}}]x\frac{dy}{dx}=x+[\frac{x}{\sqrt{{x}^{2}-{y}^{2}}}+{e}^{\frac{y}{x}}]y$ pass through the points $(1,0)$ and $(2\alpha ,\alpha ),\alpha >0$. Then $\alpha$ is equal to

Let $f(x)=\mathrm{max}{|x+1|,|x+2|,\ldots ,|x+5|}$. Then ${\int }_{-6}^{0}f(x)dx$ is equal to ______.

Let ${I}_{n}(x)={\int }_{0}^{x}\frac{1}{{({t}^{2}+5)}^{n}}dt,n=1,2,3,\ldots .$ Then

Let $f(x)={\begin{matrix}{x}^{3}-{x}^{2}+10x-7, & x\leq 1 \\ -2x+{\mathrm{log}}_{2}({b}^{2}-4), & x>1\end{matrix}$ Then the set of all values of $b$, for which $f(x)$ has maximum value at $x=1$, is:

Let $f(x)={3}^{{({x}^{2}-2)}^{3}+4},x\in R$. Then which of the following statements are true? $P:x=0$ is a point of local minima of $f$ $Q:x=\sqrt{2}$ is a point of inflection of $f$ $R:{f}^{'}$ is increasing for $x>\sqrt{2}$

Let $\frac{dy}{dx}=\frac{ax-by+a}{bx+cy+a}$, where $a,b,c$ are constants. represent a circle passing through the point $(2,5)$. Then the shortest distance of the point $(11,6)$ from this circle is

Let $f(x)={\begin{matrix}\frac{\mathrm{sin}(x-[x])}{x-[x]}, & x\in (-2,-1) \\ \mathrm{max}(2x,3[|x|]), & |x|<1 \\ 1, & \mathrm{otherwise}\end{matrix}$ where $[t]$ denotes greatest integer $\leq t$. If $m$ is the number of points where $f$ is not continuous and $n$ is the number of points where $f$ is not differentiable, the ordered pair $(m,n)$ is:

Let $f(x)={\begin{matrix}|4{x}^{2}-8x+5|, & \mathrm{if}8{x}^{2}-6x+1\geq 0 \\ [4{x}^{2}-8x+5], & \mathrm{if}8{x}^{2}-6x+1<0\end{matrix}$, where $[\alpha ]$ denotes the greatest integer less than or equal to $\alpha$. Then the number of points in $R$ where $f$ is not differentiable is _____ .

Let $f(x)=\mathrm{min}{[x-1],[x-2],\ldots ,[x-10]}$ where $[t]$ denotes the greatest integer $\leq t$. Then ${\int }_{0}^{10}f(x)dx+{\int }_{0}^{10}{(f(x))}^{2}dx+{\int }_{0}^{10}|f(x)|dx$ is equal _______. to

The maximum value of sin x + cos x is:

Suppose $y=y(x)$ be the solution curve to the differential equation $\frac{dy}{dx}-y=2-{e}^{-x}$ such that $\underset{x\rightarrow \infty }{\mathrm{lim}}y(x)$ is finite. If $a$ and $b$ are respectively the $x-$ and $y-$intercept of the tangent to the curve at $x=0$, then the value of $a-4b$ is equal to _______.

The area bounded by the curve $y=|{x}^{2}-9|$ and the line $y=3$ is

The area bounded by the curves $y=|{x}^{2}-1|$ and $y=1$ is

The area enclosed by ${y}^{2}=8x$ and $y=\sqrt{2}x$ that lies outside the triangle formed by $y=\sqrt{2}x,x=1,y=2\sqrt{2}$, is equal to

The area enclosed by the curves $y={\mathrm{log}}_{e}(x+{e}^{2}),x={\mathrm{log}}_{e}(\frac{2}{y})$ and $x={\mathrm{log}}_{e}2$, above the line $y=1$ is

The area (in sq. units) of the region enclosed between the parabola ${y}^{2}=2x$ and the line $x+y=4$ is ______.

The area of the bounded region enclosed by the curve $y=3-|x-\frac{1}{2}|-|x+1|$ and the $x$-axis is

The area of the region bounded by ${y}^{2}=8x$ and ${y}^{2}=16(3-x)$ is equal to

The area of the region enclosed between the parabolas ${y}^{2}=2x-1$ and ${y}^{2}=4x-3$ is.

The area of the region enclosed by $y\leq 4{x}^{2},{x}^{2}\leq 9y$ and $y\leq 4$, is equal to

The area of the region given by $A={(x,y):{x}^{2}\leq y\leq \mathrm{min}{x+2,4-3x}}$ is

The area of the region ${(x,y):|x-1|\leq y\leq \sqrt{5-{x}^{2}}}$ is equal to

The area of the region $S={(x,y):{y}^{2}\leq 8x,y\geq \sqrt{2}x,x\geq 1}$ is

The area of the smaller region enclosed by the curves ${y}^{2}=8x+4$ and ${x}^{2}+{y}^{2}+4\sqrt{3}x-4=0$ is equal to

The curve $y(x)=a{x}^{3}+b{x}^{2}+cx+5$ touches the $x$-axis at the point $P(-2,0)$ and cuts the $y$-axis at the point $\mathrm{Q}$, where ${y}^{'}$ is equal to $3$. Then the local maximum value of $y(x)$ is

The function $f:R\rightarrow R$ defined by $f(x)=\underset{n\rightarrow \infty }{\mathrm{lim}}\frac{\mathrm{cos}(2\pi x)-{x}^{2n}\mathrm{sin}(x-1)}{1+{x}^{2n+1}-{x}^{2n}}$ is continuous for all $x$ in

The function $f(x)=x{e}^{x(1-x)},x\in R$, is

The general solution of the differential equation $(x-{y}^{2})dx+y(5x+{y}^{2})dy=0$ is

The integral $\frac{24}{\pi }{\int }_{0}^{\sqrt{2}}\frac{(2-{x}^{2})\mathrm{dx}}{(2+{x}^{2})\sqrt{4+{x}^{4}}}$ is equal to ______.

The integral $\int \frac{(1-\frac{1}{\sqrt{3}})(\mathrm{cos}x-\mathrm{sin}x)}{(1+\frac{2}{\sqrt{3}}\mathrm{sin}2x)}dx$ is equal to

The integral ${\int }_{0}^{\frac{\pi }{2}}\frac{1}{3+2\mathrm{sin}x+\mathrm{cos}x}dx$ is equal to:

The integral ${\int }_{0}^{1}\frac{1}{{7}^{[\frac{1}{x}]}}dx$, where $[\cdot ]$ denotes the greatest integer function, is equal to

The lengths of the sides of a triangle are $10+{x}^{2}$, $10+{x}^{2}$ and $20-2{x}^{2}$. If for $x=k$, the area of the triangle is maximum, then $3{k}^{2}$ is equal to

The minimum value of the twice differentiable function $f(x)={\int }_{0}^{x}{e}^{x-t}{f}^{'}(t)dt-({x}^{2}-x+1){e}^{x},x\in R$, is

The number of distinct real roots of ${x}^{4}-4x+1=0$ is

The number of distinct real roots of the equation ${x}^{7}-7x-2=0$ is

The number of distinct real roots of the equation ${x}^{5}({x}^{3}-{x}^{2}-x+1)+x(3{x}^{3}-4{x}^{2}-2x+4)-1=0$ is

The number of points, where the function $f:R\rightarrow R,f(x)=|x-1|\mathrm{cos}|x-2|\mathrm{sin}|x-1|+(x-3)|{x}^{2}-5x+4|$, is NOT differentiable, is

The number of points where the function $f(x)={\begin{matrix}|2{x}^{2}-3x-7| & \mathrm{if}x\leqslant -1 \\ [4{x}^{2}-1] & \mathrm{if}-1<x<1 \\ |x+1|+|x-2| & \mathrm{if}x\geqslant 1\end{matrix}$, where $[t]$ denotes the greatest integer $\leqslant t$, is discontinuous is ______

The number of real solutions of ${x}^{7}+5{x}^{3}+3x+1=0$ is equal to _____.

The odd natural number a, such that the area of the region bounded by $y=1,y=3,x=0,x={y}^{a}$ is $\frac{364}{3}$, equal to:

The slope of normal at any point $(x,y),x>0,y>0$ on the curve $y=y(x)$ is given by $\frac{{x}^{2}}{xy-{x}^{2}{y}^{2}-1}$. If the curve passes through the point $(1,1)$, then $e\cdot y(e)$ is equal to

The slope of the tangent to a curve $C:y=y(x)$ at any point $[x,y)$ on it is $\frac{2{e}^{2x}-6{e}^{-x}+9}{2+9{e}^{-2x}}$. If $C$ passes through the points $(0,\frac{1}{2}+\frac{\pi }{2\sqrt{2}})$ and $(\alpha ,\frac{1}{2}{e}^{2\alpha })$ then ${e}^{\alpha }$ is equal to

The sum of absolute maximum and absolute minimum values of the function $f(x)=|2{x}^{2}+3x-2|+\mathrm{sin}x\mathrm{cos}x$ in the interval $[0,1]$ is

The sum of the absolute maximum and absolute minimum values of the function $f(x)={\mathrm{tan}}^{-1}(\mathrm{sin}x-\mathrm{cos}x)$ in the interval $[0,\pi ]$ is

The sum of the absolute minimum and the absolute maximum values of the function $f(x)=|3x-{x}^{2}+2|-x$ in the interval $[-1,2]$ is

The surface area of a balloon of spherical shape being inflated, increases at a constant rate. If initially, the radius of balloon is $3$ units and after $5$ seconds, it becomes $7$ units, then its radius after $9$ seconds is

The value of ${\mathrm{log}}_{e}2\frac{d}{\mathrm{dx}}({\mathrm{log}}_{\mathrm{cos}x}cosecx)$ at $x=\frac{\pi }{4}$ is

The value of $b>3$ for which $12{\int }_{3}^{b}\frac{1}{({x}^{2}-1)({x}^{2}-4)}dx={\mathrm{log}}_{e}(\frac{49}{40})$, is equal to _____.

The value of $\underset{x\rightarrow 1}{\mathrm{lim}}\frac{({x}^{2}-1){\mathrm{sin}}^{2}(\pi x)}{{x}^{4}-2{x}^{3}+2x-1}$ is equal to:

The value of ${\int }_{0}^{\pi }\frac{{e}^{\mathrm{cos}x}\mathrm{sin}x}{(1+{\mathrm{cos}}^{2}x)({e}^{\mathrm{cos}x}+{e}^{-\mathrm{cos}x})}dx$ is equal to

The value of the integral ${\int }_{-2}^{2}\frac{|{x}^{3}+x|}{({e}^{x|x|}+1)}dx$ is equal to

The value of the integral ${\int }_{0}^{\frac{\pi }{2}}60\frac{\mathrm{sin}(6x)}{\mathrm{sin}x}dx$ is equal to

The value of the integral${\int }_{-\frac{\pi }{2}}^{\frac{\pi }{2}}\frac{dx}{(1+{e}^{x})({\mathrm{sin}}^{6}x+{\mathrm{cos}}^{6}x)}$ is equal to

The value of the integral $\frac{48}{{\pi }^{4}}{\int }_{0}^{\pi }(\frac{3\pi {x}^{2}}{2}-{x}^{3})\frac{\mathrm{sin}x}{1+{\mathrm{cos}}^{2}x}dx$ is equal to ______.

$I={\int }_{\frac{\pi }{4}}^{\frac{\pi }{3}}(\frac{8\mathrm{sin}x-\mathrm{sin}2x}{x})dx$. Then

Water is being filled at the rate of $1{\mathrm{cm}}^{3}{\mathrm{sec}}^{-1}$ in a right circular conical vessel (vertex downwards) of height $35\mathrm{cm}$ and diameter $14\mathrm{cm}$. When the height of the water level is $10\mathrm{cm}$, the rate (in ${\mathrm{cm}}^{2}{\mathrm{sec}}^{-1}$) at which the wet conical surface area of the vessel increases is

${\int }_{0}^{5}\mathrm{cos}(\pi (x-[\frac{x}{2}]))dx$, where $[t]$ denotes greatest integer less than or equal to $t$, is equal to

$\int \frac{({x}^{2}+1){e}^{x}}{{(x+1)}^{2}}dx=f(x){e}^{x}+C$, where $C$ is a constant, then $\frac{{d}^{3}f}{d{x}^{3}}$ at $x=1$ is equal to

${\int }_{0}^{2}(|2{x}^{2}-3x|+[x-\frac{1}{2}])dx$, where $[t]$ is the greatest integer function, is equal to