

InterviewSolution
Saved Bookmarks
1. |
Find the 20th term of the AP whose 7th term is 24 less than the 11th term, first term being 12. |
Answer» Let the a be first term and d be common difference As we know an = a + (n - 1)d Given, a7 = a11 - 24 a + 6d = a + 10d - 24 10d - 6d = 24 4d = 24 d = 6 given a = 12 then, a20 = a + 19d a20 = 12 + 19(6) = 12 + 114 = 126 |
|