Question

Find the 15^th term from the end (towards first term) of the A.P. 3, 8, 13,....., 253.

Answer 1

3, 8, 13,.....,253.

Here, d = a₂ − a₁ = 8 − 3 = 5; l = 253; N = 15

n^th term from the end = l − (N − 1)d

15^th term from the end = 253 − (15 − 1)5

= 253 − (14)5

= 253 − 70

= 183