Question

Let f(x)=x²+1/x² and g(x)=x-1/x,x∈ R -{-1,0,1}. If h(x)=f(x)/g(x), then the local minimum value of h(x) is
(1) 3
(2) – 3
(3) − 2√2
(4) 2√2

Answer 1

Ans. [4]
Solution:

Differentiate both side