Question

Find the second derivative.
f(x)=(2x^2+4)^7/2

Answer 1

I assume you meant
f(x)=(2x^2+4)^(7/2), since the "/2" at the end is kind of weird otherwise.

So, use the power rule and chain rule. If

f = u^n, f' = n u^(n-1) u'

f' = (7/2)(2x^2+4)^(5/2) (4x)
= 14x (2x^2+4)^(5/2)

Answer 2

how do u find the second derivative?