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| 1. |
Write the sum of first n odd numbers |
| Answer» Natural odd no:s forms an A.P1,3,5,7 ....a = 1 , d = 2Sn = n/2 [ 2a + [n-1]d ]\xa0 = n/2 [ 2 + 2n - 2 ]\xa0 = n/2 [ 2n ] = n²Sum of n natural odd no:s = n² | |