F (x)=4x^3-3x^2-x-1 , при x=-1

Question

F (x)=4x^3-3x^2-x-1 , при x=-1

Answer 1

F'(x)=(4x³-3x²-x-1)'=4*3x²-3*2x-1=12x²-6x-1
F'(-1)=12*(-1)²-6*(-1)-1=12+6-1=17