d/dx f(x^3)=1/x f(x)导数多少

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/08 13:56:18
d/dx f(x^3)=1/x f(x)导数多少

d/dx f(x^3)=1/x f(x)导数多少
d/dx f(x^3)=1/x f(x)导数多少

d/dx f(x^3)=1/x f(x)导数多少
两边积分得
f(x^3)=lnx
所以f(x)=ln(x ^1/3)
f′(x)=1/(x ^1/3)*1/3*x^(-2/3)
=x^(-1/3)*1/3*x^(-2/3)
=1/3*x^(-1)
=1/(3x)