Jee Main
Sequences And Series
JEE Main 2026 (Online) 28th January Morning Shift
MCQ+4 / -12026
The value of $\sum\limits_{k=1}^{\infty}(-1)^{k+1}\left(\frac{k(k+1)}{k!}\right)$ is
Jee Main
JEE Main 2026 (Online) 28th January Morning Shift
The value of $\sum\limits_{k=1}^{\infty}(-1)^{k+1}\left(\frac{k(k+1)}{k!}\right)$ is