Question

In an AP, the 18th term is 20 more than the 13th term. If the fourth term is 22 find the AP.​

Answer 1

Answer:

Given a10=52

an=a+(n−1)d52=a+9d(1)

also, a17=20+a13a+16d=20+a+12d4d=20d=5(2)

From (1) and (2)

52=a+9×5a=7

The AP is: 7,12,17,22,...

Answer 2

Answer:

7,12,17,22... is that A.P.

Hope it helps you...