Question

Derivative of x^4 e^-x.
I would use the product rule .
f(x) = x^4
f'(x) = 4x^3
g(x) = e^-x
g'(x) =-e^-x
h'(x) = 4x^3(e^-x) + x^4(-e^-x)

Answer 1

correct :)

Answer 2

thanks :D

Answer 3

yup thats right