Question

Найдите f’(-1/2), если
f(x)=3x^-2

Answer 1

$f(x)=3x^{-2}\\f'(x)=3(x^{-2})'=3*(-2x^{-3})=-frac{6}{x^{3} }\\f'(-frac{1}{2} )=-frac{6}{(-frac{1}{2})^{3}}=-frac{6}{-frac{1}{8} }=48$