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prouver-que-f-x-y-x-2-y-2-est-differentiable-




Question Number 167896 by SANOGO last updated on 28/Mar/22
prouver que   f(x,y)=x^2 +y^2 est differentiable
$${prouver}\:{que}\: \\ $$$${f}\left({x},{y}\right)={x}^{\mathrm{2}} +{y}^{\mathrm{2}} {est}\:{differentiable} \\ $$

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