cos(xy)=(xy)^2求dy请高人解析一下

cos(xy)=(xy)^2求dy请高人解析一下 lnx+cos（xy）=2 求 dy xy^3-cos(x+y)=1,求dy xy^3-cos(x+y)=1,求dy 求通解,dy/dx-3xy=xy^2 求dx/dy-3xy=xy^2的通解 设e^xy-xy^2=Siny,求dy/dx 求dy/dx+2xy+xy^4的通解求dy/dx+2xy+xy^4=0的通解 求微分过程中,方程两边都有dx,这个dx可以约去吗?如方程：(xy)^2=cos(xy),求dy?两边同时取微分：2(xy)d(xy)=-sin(xy)d(xy);约去d(xy)：2xy=-sin(xy);两边同时取微分：2d(xy)=-cos(xy)d(xy);约去d(xy)：2=-cos(xy);两边 y/x=ln(xy) 求dy/dx(xy-y^2)/(xy+x^2) dy/dx=3xy+xy^2.求y. 求导：xy=x-e^xy,求dy/dx e∧(x+y)+cos(xy)=0,求dy/dx, cos(xy)=x求隐函数的导数dy/dx 求方程所确定的函数的微分dy y=cos(xy)-x 设e^(x+y)+cos(xy)=0确定y是x的函数求dy 已知sin(xy)=x^2,求 dy/dx= 求dy/dx=2xy^2的通解