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| 1. |
Find the sum of odd integers from 1to2001 |
| Answer» As..a=1 and d=2....and an=2001Therefore...An=a+(n-1)d2001=1+(n-1)2n=1001..Now...Sn=n/2 (a+l)Sn=1001/2 (1+2001)Sn=1002001 | |