y=2x 则 d^2y/dx^2 = 2 是否正确?
d/dx((x^2+y^2)^2)=d/dx(x^2-y^2),求(化简)dy/dx=?
方程x(y^2-1)dx+y(x^2-1)dy=0的常数解是y=±1,x=±1.是否正确?
d^2y /dx^2 - 24 =0 dy/dx -2y = e^-x
设函数y=x^4-8x^2,则 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
设y=x+siny,则[(d^2)y]/[dx^2]=?
从(dx)/(dy)=1/y '导出:(d^2x)/(dy^2)=-y''/(y')^3
已知y=cosx^2,求d^y/dx^2;d^y/dx^3..
已知dx/dy=1/y′,求d(2)y/d x^2?
d^2y/dx^2=(dy/dx)'×(dy/dx),另外请解释下dx,dy的含义,dx和dy是指x=...和y=...
请教数学高手(d/dx)X^2+(d/dx)Y^2=0怎么推出2X+2Y(dy/dx)=0,是对X求导吗?
y=(1+x^2)arctan x 用MATLAB求(d^2*y)/dx^2