Ononot — For the function f(x) = e^{-1/x^2} for x \neq 0 and f(0) = k

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Limits & Continuitymedium

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For the function $f(x) = e^{-1/x^2}$ for $x \neq 0$ and $f(0) = k$ , what value of $k$ makes $f$ continuous at $x=0$ ?