Question

calcule a derivada da função: f(x) = (6/x^2) - 3*x - 1

Answer 1

$f(x) = \frac{6}{x^2} - 3x - 1 \\ f'(x)=(\frac{6}{x^2})'-3 \\ f'(x)=\frac{0-6.2x}{x^4}-3 \\ \boxed{f'(x)=\frac{-12}{x^3}-3}$