InterviewSolution
Saved Bookmarks
| 1. |
what is the comman difference of an a.p in which a21-a7=84 |
|
Answer» Let a is the first term and d is the common difference of an APa21-a7= 84a21= a +20da7= a + 6da + 20d - a - 6d= 8414d = 84d = 84/14d = 6 |
|