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JEE MATHEMATICS MCQ: COMBINATIONS

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The sum

\sum_{r=1}^{10}\left(r^{2}+1\right) \times(r !)

is equal to :

View answer and explanation

Correct option: B

10 \times(11

!)

The correct answer is B (10 ×(11 !)) because the sum telescopes to 10 × 11! after simplification and summation.

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n