C-13-Q121: The sum of $(2n + 1)$ terms of $1 - 1 + 1 - 1 + \cdots$ is —

C-13-Q121: The sum of $(2n + 1)$ terms of $1 - 1 + 1 - 1 + \cdots$ is — | প্রশ্ন করি

2

2

The sum of (2n+1)(2n + 1)(2n+1) terms of 1−1+1−1+⋯1 - 1 + 1 - 1 + \cdots1−1+1−1+⋯ is —