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| 1. |
If an=5-11n for an A.P.,then find its common difference |
| Answer» If n = 1 ;a1 = 5-(11×1)a1 = -6If n = 2 ;a2 = 5-(11×2)a2 = -17Now , a1=-6 & a2=-17Hence, common difference =d = a2-a1= -17-(-6)= -11 | |