Question

Let G(r)= r^(1/2)+r^(1/5). Answer the following questions.
1. Find the first derivative of G(r).
Answer: G′(r)=
(5r^(3/10)+2)/(10r^(4/5))
2. Find the second derivative of G(r).
Answer: G′′(r)=

Answer 1

I know the first answer is right but i cant seem to find the second one

Answer 2

@mathmale @dan815

Answer 3

@Zarkon