y=sin^3(1/x)的导数是

网友回答

y'=(sin^3(1/x))'
=3sin^2(1/x)*(sin(1/x))'
=3sin^2(1/x)*cos(1/x)*(1/x)'
=-(3sin^2(1/x)cos(1/x))/x^2
======以下答案可供参考======
供参考答案1:
y'=3sin^2(1/x)cos(1/x)(-1/x^2)=-[3sin^2(1/x)cos(1/x)]/x^2