The function f(x, y) = (x+y)/(x^2+y^2) is not defined at the origin. Is it possible to define it at the origin such that

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answerhappygod
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The function f(x, y) = (x+y)/(x^2+y^2) is not defined at the origin. Is it possible to define it at the origin such that

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The function f(x, y) = (x+y)/(x^2+y^2) is not defined atthe origin. Is it possible to define it at the originsuch that the f is continuous at the origin?
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