Question

Find the 8th term from the end of the AP 7, 10, 13, ..., 184.

Answer 1

Here, a = 7 and d = (10 – 7) = 3, l = 184 and n = 8^th form the end.

Now, n^th term from the end = [l – (n – 1)d]

8^th term from the end = [184 – (8 – 1) × 3]

= [184 – (7 × 3)]

= (184 – 21)

= 163

Hence, the 8^th term from the end is 163.