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A simple limit

Calculus Level 1

$1 - \dfrac 12 + \dfrac 14 - \dfrac 18 + \dfrac 1{16} - \dfrac 1{32} + \cdots = \, ?$

\dfrac 58

\dfrac{11}{16}

\dfrac{341}{512}

\dfrac 23

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by Denton Young

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