d^2y/dx^2=a-(dy/dx)^2*(1/y)a为常数~
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d^2y/dx^2=a-(dy/dx)^2*(1/y)a为常数~d^2y/dx^2=a-(dy/dx)^2*(1/y)a为常数~d^2y/dx^2=a-(dy/dx)^2*(1/y)a为常数~我写过这
d^2y/dx^2=a-(dy/dx)^2*(1/y)a为常数~
d^2y/dx^2=a-(dy/dx)^2*(1/y)
a为常数~
d^2y/dx^2=a-(dy/dx)^2*(1/y)a为常数~
我写过这道题了,请参见:http://zhidao.baidu.com/question/130140980.html
d^2y/dx^2=a-(dy/dx)^2*(1/y)a为常数~
x=a(θ-sinθ) y=a(1-cosθ)x=a(θ-sinθ),y=a(1-cosθ).求d^2y/dx^2.dy/dx=cotθ/2,d^2y/dx^2=d/dx*dy/dx=d(dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθ= 我想问哈d^2y/dx^2那后面d(dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθz这两步是如何化解的.
(x^2)dy+(y^2)dx=dx-dy
反函数的二阶导数疑问设dy/dx=y',则dx/dy=1/y',应视为y的函数则d2x/dy2=d(dx/dy)/dy(定义)=d(1/(dy/dx)) / dy=d(1/(dy/dx))/dx * dx/dy(复合函数求导,x是中间变量)=-y''/(y')^2 * (1/y')=-y''/(y')^3d(1/(dy/dx))/dx * dx/dy
参数方程求导这个问题怎么解释 d^2y/dx^2=[d/dt(dy/dx)]/dx/dt为什么二阶倒数写成d^2y/dx^2,为什么不是dy^2/dx^2,或者(dy/dx)^2
d^2y/dx^2=a-(dy/dx)^2*(1/y). 方程里的a是常数
y=[sin(x^4)]^2,则dy/dx=?,dy^2/dx^2=?,dy/d(x^2)=?
d/dx((x^2+y^2)^2)=d/dx(x^2-y^2),求(化简)dy/dx=?
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求微分方程通解 d^2y/dx^2-e^y* dy/dx=0
二次微分中关于dx dx^2 (dx)^2的疑问二次微分定义公式是:d(dy/dx)/dx=d^2y/dx^2,我想问:d(dy/dx)/dx本来是等于d(dy)/[dx*d(dx)],接着等于d^2y/(dx*d^2x),接下来为什么就等于d^2y/dx^2啊!我想问问:为什么dx^2=dx*
参数方程求导这个问题怎么解释d^2y/dx^2=[d/dt(dy/dx)]/(dx/dt)
参数方程求导这个问题怎么解释d^2y/dx^2=[d/dt(dy/dx)]/dx/dt
d(dy/dx)/dx为什么等于d^2y/dx^2 ?如题~~~~~~~~~~
d(t(dy/dt))/dx为什么等于t² d²y/dt²+t dy/dt作变量代换x=lnt简化方程d^2y/dx^2-dy/dx+e^2x*y=0x=lntdx/dt=1/tdy/dx=(dy/dt)/(dx/dt)=t dy/dtd²y/dx²=[d/dt(dy/dx)]/(dx/dt)=t² d²y/dt²+t dy/dt代入d^2y/dx^2-