Question

Dadas as funções a seguir, calcule f ' (x)                                                                           A)  f(x)=7x³-2x²+x-1

Answer 1

$f(x)=7x^3 - 2x^2 +x -1\\\\\\\\f'(x)=3*7x^{3-1} -2*2x^{2-1} + 1\\\\\\\boxed{f'(x)=21x^2 -4x+1}$