Z=(X^2一y)/(X十y),而y=2X一3,求dz/dx
Z=(X^2一y)/(X十y),而y=2X一3,求dz/dx
若z=e^(x^2+y^3),求dz/dx,dz/dy
z=u^v,而u=x+2y,v=x-y,求dz/dx,dz/dy(偏导数)
X十2y一3Z=0,2X十3y十5Z=0求X十y十Z/X一y十Z的值
z=(2y+7)^2 * ln(x^3+2) 求dz/dx 和 dz/dy
微分方程(首次积分)已知dx/(e^x+z)=dy/(e^y+z)=dz/(z^2-e^(x+y)),求x,y,z的关系
设x+y^2+z=ln(x+y^2+z)^1/2,求dz/dx
设有方程x+y^2+z^2=2z,求dz/dx dz/dy
设Z=f(x^2 +y,2xy),求dz/dx和dz/dy
(x十2y一z)(x一2y十z)一(x十2y十z)2
设二元函数 z=u^2,u=x+y v=x-y ,求dz/dx,dz/dy
z=u^v,而u=x+2y,v=x-y,求dz/dx,dz/dy.各种求过程