已知:yf(x)+x^2*f(y)=2xy,求dy/dx
已知df(x,y)=(2y^2+2xy+3x^2)dx+(4xy+x^2)dy,求f(x,y)
f(xy)=xf(y)+yf(x) 求f(x)
x^2+xy+y^3=1,求dy/dx
设Z=f(x^2 +y,2xy),求dz/dx和dz/dy
已知y=f(x^2),其中f(x)具有一阶连续导数,求dy/dx.
已知x^2y+2xy+3=-18 求dy/dx
y=f[(x-1)/(x+1)],f'(x)=arctanx^2,求dy/dx,dy
已知e^y+e^x-xy^2=0,求dy/dx
设函数y=f(x)由方程sin(x^2+y)=xy 确定,求dy\dx
已知方程xy-eˆ2x=siny 确定隐函数y=y(x),求dy/dx
y=f(x)由方程xy+e^xy+y=e确定,求dy/dx和d^2y/dx^2
已知y=x^cosx/2,求dy/dx,