f′(x)=cosx+sinx=2sin(x+4π).
f′(x)<0 when sin(x+π/4)<0, i.e., x+π/4∈(π,2π).
So x∈(43π,47π).
A discrete random variable X takes the values 0, 1, 2, 3, 4 and its mean is 1.6. If P(X=1)=0.4, P(X=4)=P(X=2) and P(X=3)=2P(X=2), then P(X=0) is :
Held on 15 Jun 2023 · Verified 13 Jul 2026.
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If the total cost and total revenue of a company that produces and sells $x$ units of a particular product are $C(x) = 5x + 350$ and $R(x) = 50x - x^2$ respectively, then which of the following is/are the breakeven values: (A) $x = 10$ (B) $x = 25$ (C) $x = 45$ (D) $x = 30$ Choose the correct answer from the options given below:
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