设方程sin y +ex(x次方)-xy 2(平方)=0确定隐函数y =y (x),求dy /dx
问题描述:
设方程sin y +ex(x次方)-xy 2(平方)=0确定隐函数y =y (x),求dy /dx
答
∵siny+e^x-xy^2=0,∴(dy/dx)cosy+e^x-[y^2+2xy(dy/dx)]=0,
∴(cosy-2xy)(dy/dx)=y^2-e^x,∴dy/dx=(y^2-e^x)/(cosy-2xy).