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| 1. |
Find the sum of first 100 positive integer |
| Answer» Sn\xa0=\xa0{tex}\\frac { n } { 2 } [ a + l ]{/tex}{tex}\\Rightarrow{/tex}\xa0S100\xa0=\xa0{tex}\\frac { 1000 } { 2 }{/tex}[{tex}1 + 100] = 50050{/tex} | |