Question

solve 1+2+3......124​

Answer 1

❣️$\textit{\large{\green{\underline{\underline{Answer:-}}}}}$

$\mathtt{\boxed{\red{1+2+3+...124=7750}}}$

$\textbf{\large{\pink{\underline{\underline{Step by step Explanation:-}}}}}$

$\textit{\underline{Given,,}}$

$\mathtt{a_{n}=124}$

$\textit{\underline{Hence,,}}$

$\mathtt{S_{n}=\frac{(a_{n})(a_{n}+1)}{2}}$

$\mathtt{=\frac{(124)(124+1)}{2}}$

$\mathtt{=\frac{(124)(125)}{2}}$

$\mathtt{=62\times{125}}$

$\mathtt{=7750}$

❣️❣️✌️Hope you like it.. please mark it as Brainliest answer.... thanks ❣️❣️✌️