A problem in differential equation

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  • #2
lurflurf
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by the chain rule
[tex]\frac{d}{dx}=\frac{\partial}{\partial x}+\frac{dy}{dx}\frac{\partial}{\partial y}[/tex]
 
  • #4
lurflurf
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[tex]\frac{d^2 y}{dx^2}=\frac{df}{dx}=\frac{\partial f}{\partial x}+f \frac{\partial f}{\partial y}[/tex]

the values of f and its first order partials are known from the problem statement
 

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