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| 1. |
find the sum og firdt 8 multiples if 3 |
| Answer» S = 3 + 6 + 9 + 12 + .... + 24= 3(1 + 2 + 3 + ... + 8)= 3\xa0{tex}\\times{/tex}\xa0{tex}\\frac{8 \\times 9}{2}{/tex} = 108 | |