C-07-Q027: The value of $S_{10}$ for the series $1 + 2 + 3 + 4 + \ldots$ is —

C-07-Q027: The value of $S_{10}$ for the series $1 + 2 + 3 + 4 + \ldots$ is — | প্রশ্ন করি

The value of S10S_{10}S10​ for the series 1+2+3+4+…1 + 2 + 3 + 4 + \ldots1+2+3+4+… is —