lbslbs的个人空间

复合函数求导法则: Y=f(u),U=g(x),则y′=f(u)′*g(x)′ 例1.y=Ln(x^3),Y=Ln(u),U=x^3, y′=f(u)′*g(x)′=[1/Ln(x^3)]*(x^3)′=[1/Ln(x^3)]*(3x^2) =(3x^2)/Ln(x^3)] 例2...