Question

If n^th term of an AP is (2n+1) what is the sum of its first three terms.

Answer 1

according to question

nth term = 2n + 1

so 1st term = 2×1+1 = 3

2nd term = 2×2+1 = 5

and 3rd term = 2×3+1 = 7

by adding them up

3+5+7 = 15 ans

Answer 2

Hey

Here is ur ans

Hope it helps