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  "body": "\n## Summary\n\nA partial derivative of a [[function of several variables|0JPCHTXWG0]] is its derivative with respect to one variable, while all other variables stay fixed.\nIt measures the rate of change of the function along one coordinate axis.\nFor $f(x, y) = x^2 y$, the partial derivatives are $\\partial f / \\partial x = 2xy$ and $\\partial f / \\partial y = x^2$.\n",
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