Question

If nth term of an AP is (2n+1), what is the sum of its first three terms 6

Answer 1

Answer:

15

Step-by-step explanation:

1st term = 2×1 +1 =3

2nd term = 2×2 +1 = 5

3rd term = 2×3 +1 = 7

Sum of 1st three terms = 3+5+7= 15