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)
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)
已知dx/dy=1/y′,求d(2)y/d x^2?
x^2+xy+y^3=1,求dy/dx
d/dx((x^2+y^2)^2)=d/dx(x^2-y^2),求(化简)dy/dx=?
求微分方程的通解:x^2(d^2y/dx^2)=(dy/dx)^2+2x(dy/dx)
下面都是求微分方程的通解:1、(y^-2xy)dx+x^2dy=0 2、(x^2+y^2)dy/dx=2xy 3、xy’
已知(dy/dx)=(1/y) ,求 (d^2y)/(d^2x)=?注意:不是求(d^2y)/(dx^2)
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
(d^3y/dx^3)-2(d^2y/dx^2)-dy/dx+2y=0的通解怎么求?
隐函数求二阶导数的简单问题 已知 dy/dx=-x/y 求d^2y/dx^2
matlab求(d³y)/dx³+3(dy/dx)+2y=6的通解
y^2+xy+3x=9求:dy/dx,于是得到2y dy/dx+1 y+dy/dx+3=0,我不明白怎将y看成x的函数?