JEE Main 28 Jan 2026 Shift 1 Paper Solved Paper

Section: Mathematics

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Question : 13 of 75

Marks: +1, -0

The value of

∞

∑

k=1

(−1)k+1(‌

k(k+1)

k!

) is

[28 Jan 2026 Shift 1]

e∕2
√e
2∕e
1∕e

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