Question

Find:

8^th term of the AP 11, 104, 91, 78, …………… 

Answer 1

Given sequence is 117, 104, 91, 78, ………….

First term (a) = 117

Common difference (d) = Second term – first term

= 104 – 117

= – 13

We know that, n^th term = a + (n – 1)d

Then, 8^th term = a + (8 – 1)d

= 117 + 7(-13)

= 117 – 91

= 26

∴ 8^th term of the A. P. is 26.