4. Which term of the series 2 +5 +8.... is 53 ?(a) 10(b) 12(c) 18o (d)

1.	4. Which term of the series 2 +5 +8.... is 53 ?(a) 10(b) 12(c) 18o (d) 20
Answer» Given series 2, 5, 8....is in AP First term a = 2, common difference d = 5 - 2 = 3 nth term of an APan = a + (n-1)d Therefore,Let mth term of an AP is 5353 = 2 + (m-1)*353 - 2 = 3m - 33m = 51 + 3m = 54/3 = 18 18th term of an AP is 53 (c) is correct option

4. Which term of the series 2 +5 +8.... is 53 ?(a) 10(b) 12(c) 18o (d) 20

Answer»

Given series 2, 5, 8....is in AP

First term a = 2, common difference d = 5 - 2 = 3

nth term of an APan = a + (n-1)d

Therefore,Let mth term of an AP is 5353 = 2 + (m-1)*353 - 2 = 3m - 33m = 51 + 3m = 54/3 = 18

18th term of an AP is 53