Differential equations

Solve the ordinary differential equation $\frac{d^{2}y }{dx^{2} } =y$  for y as a function of x. (Note that this is equivalent to y" = y.)

Solve the partial differential equation $ \frac{∂^{2} f}{∂x∂y} = xy$  for f as a function of x and y.


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Mathe Mathe
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