Question

What is the derivative of x^2/a^2 + a^2/x^2 if x=a

Answer 1

Let
\[y=\frac{ x^2 }{ a^2 }+a^2x ^{-2}\]
\[\frac{ dy }{ dx }=\frac{ 2x }{ a^2 }-2a^2x ^{-3}\]

Answer 2

put x=a and get the sol.

Answer 3

Thanks :)