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| 1. |
Sn=4095, r=4, n=6, a=? |
| Answer» Sn = n/2 (a + r). 6/2 (a + 4) = 4095. 3 (a + 4) = 4095. a + 4 = 4095/3. a + 4 = 1365. a = 1361.// | |