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$e$ game

Calculus Level 3

$\large e = ?$

\sum_{k=1}^2\dfrac{k^2}{3k}

\sum_{k=0}^\infty \dfrac{(k-1)^2}{k!}

\sum_{k=0}^\infty \dfrac{(2k+3)^2}{5k!}

None of these

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by Munem Shahriar

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