d/dx((x^2+y^2)^2)=d/dx(x^2-y^2),求(化简)dy/dx=?
d( )=(3x^2+2x)dx d(?)=5^2x dx 括号里应该填什么?
D(aX+E(x^2)-DX)=
定积分d/dx*[∫ (1到2)sin x^2dx]=
试从dx/dy=1/y'导出:d^2x/dy^2=-y''/(y')^3 题目中关于d[1/y']/dx}*[dx/dy
已知d[f(x^3)]/dx=1/x,则f'(x)=?
已知dx/dy=1/y′,求d(2)y/d x^2?
Ln6y=3xy,1)求dy/dx;2)求d^2y/dx^2;3)已知d^2y/dx^2=0,就满足的点(x,y)
e^(-x/2)dx= d[1+e^(-x/2)
设DX=4,DY=2且X与Y独立,则D(3X-2Y)=?
f''(x)=d^2y/dx^2=d(dy/dx)/dx (f(x)的二阶导数) 为什么分母上不是d^2x?
求微分方程的通解:x^2(d^2y/dx^2)=(dy/dx)^2+2x(dy/dx)