Question

v(x) = (f(x))^2
Find v''(x).

Answer 1

I believe that:
v'(x) = 2(f(x))*f'(x)

Answer 2

v = f^2

v' = 2f f'

v'' = 2f' f' + 2f f''

Answer 3

Thank you!

Answer 4

the (x) parts just clutter the operations