Mathematics · 2022
JEE Main · 29 July 2022, Shift 2 · Q7
Σ_r=1^20(r^2+1)(r!) is equal to
$\displaystyle \sum_{r=1}^{20}\left(r^2+1\right)(r!)$ is equal to
Official answer
(2)
$\displaystyle 22!-2(21!)$
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JEE Main 2022 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.