Question

Seja f(x) = 5x ³ + x ², calcule f’(x) e f’(1)

Answer 1

Olá!

$f(x)=5x^{3} +x^{2}\\ \\ f'(x)=3\cdot 5x^{2}+2x\\ \\ \boxed{f'(x)=15x^{2} +2x}\\ \\ f'(1)=15\cdot1^{2}+2\cdot1\\ \\ f'(1)=15\cdot 1+2\cdot 1\\ \\ f'(1)=15+2\\ \\ \boxed{f'(1)=17}$

:)