已知y=cosx^2,求d^y/dx^2;d^y/dx^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?
已知y=x^cosx/2,求dy/dx,
已知(dy/dx)=(1/y) ,求 (d^2y)/(d^2x)=?注意:不是求(d^2y)/(dx^2)
d/dx((x^2+y^2)^2)=d/dx(x^2-y^2),求(化简)dy/dx=?
隐函数求二阶导数的简单问题 已知 dy/dx=-x/y 求d^2y/dx^2
求微分方程通解 d^2y/dx^2-e^y* dy/dx=0
已知xy-e^y=0,求d^2y/dx^2
求dy/dx=x/y+(cosx/y)^2通解
求d^y\dx^
d^2y/dx^2=d(dy/dx)/dx二阶导数问题
高阶导数,dx/dy=1/y',怎样推导d^2y/dx^2=(-y'')/(y')^3.