Let f(x)=[5x^(1/4)]*[(x^3)-10]

evaluate f'(x) at the following points:

a) f'(3)

b) f'(5)

shouldn't be hard, as long as you can get f'

f'(x) = 5(13x^3-10)/(4x^(3/4))

f'(3) = 5*341/(4∜27)
f'(5) = 5*1615/(4∜125)