dx/(x^2-y^2)=dy/(-2xy)如何积分?
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(x^2)dy+(y^2)dx=dx-dy
微分方程 dy/dx=(-2x)/y
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y=[sin(x^4)]^2,则dy/dx=?,dy^2/dx^2=?,dy/d(x^2)=?
1.dy/dx=(y-x)/(y+x)2.x^2*dy/dx=xy-y^2
x^2+y^2=e^y求dy/dx