Given $f(x,y)=\frac{x}{1-2xy^{2}}$, how can I give a general formula for $D_{n,m}=\frac{\partial f^{n+m}}{\partial x^{n}\partial y^{m}}(0,0),\:\:\:n,m\geq0$ using Taylor?
Where should I begin?
2026-04-01 20:25:18.1775075118
Give a general formula for nth and mth derivative in (0,0) using Taylor.
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