Question

5,9,13,17,21,25,29,33,37,41,45,49,53,57,61,65,69,73,77,81.. in the above Ap 13th term is 53,verify your answer by using suitable formula​

Answer 1

First term, a = 5

Common difference, d = 4

Nth term of an AP = a + ( n - 1 ) d

13th term of the AP = 5 + ( 13 - 1 ) 4

= 5 + 12 × 4

= 5 + 48

= 53

The 13th term of the AP is 53, hence, verified.