求y'=y/(y-x)
求y'=y/(y-x)
二元函数f(x,y)=x+y/x-y,求f(y/x,x/y)
求微分方程y'=x/y+y/x的通解
y=2x*arctan(y/x),求y‘’
已知:4x = 5y,求(x+y) :y
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知XY.Y=-3,求-XY(X.X.X.Y.Y.Y.Y.Y.Y.Y-3.X.X.Y.Y.Y.Y.Y-Y)的值.(过程完
(x*x+y*y)(x*x+y*y)-(x*x+y*y)=12 求x*x+y*y等于多少
y'=xe^x 求y= .
求y''-y=x的通解
求x=y^y的微分