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It's Definitely Not Geometric

Calculus Level 2

\[1 + \frac {1}{\color{blue}2} + \frac {1}{\color{blue}6} + \frac {1}{\color{blue}{12}} + \frac {1}{\color{blue}{20}} + \ldots = \ \color{teal}? \]

\[\infty \] \[3\] \[4\] \[1\] \[2\]

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by Inderjeet Nair

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