求由方程x^3+y^2=4所确定的隐函数y=y(x)的dy/dx
问题描述:
求由方程x^3+y^2=4所确定的隐函数y=y(x)的dy/dx
答
dx^3+dy^2=d(4)
3x^2dx+2ydy=0
dy/dx=-3x^2/2y