Question

Найти f'(3) и f'(1), если:
f(x) = (x^2-9) (x+1)

Answer 1

f(x)=x^3+x^2-9x-9, f'(x)=3x^2+2x-9, f'(3)=3*3^2+2*3-9, f'(3)=24
f'(1)=3*1+2-9, f'(1)=-4