f(x)=x2+x21=(x−x1)2+2
g(x)=x−x1
x∈R−−1,0,1
Let x−x1=t
h(x)=g(x)f(x)=tt2+2=t+t2
t∈R−0
h(x)=t+t2
AM≥GM
Minimum of h(x)⇒2t+t2≥t×t2
t+t2≥22
Local minimum =22
JEE Main 2018 — Mathematics Calculus
Let f(x)=x2+x21 and g(x)=x−x1,x∈R−−1,0,1. If h(x)=g(x)f(x) , then the local minimum value of h(x) is:
Held on 8 Apr 2018 · Verified 6 Jul 2026.
22
3
−3
−22
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