求f(x)=sin^3·1/x的导数

问题描述:

求f(x)=sin^3·1/x的导数

-3(sin(1/x))^2acos(1/x)/x^2过程=3(sin(1/x))^2(sin(1/x))'=3(sin(1/x))^2cos(1/x)(1/x)'=-3(sin(1/x))^2cos(1/x)/x^2