Question

f(x) = x3 + 6x2 − 36x
find the critical numbers

Answer 1

Take the derivative of f(x). Critical points of the first derivative are when f'(x)=0.

Answer 2

or f'(x) DNE

Answer 3

f'(x)= 3x^2 +12x =0
3x(x+4) --> x=0 or x=-4

Answer 4

thanks for the help suzi!