Question

Sum of the first 10 terms of the AP: 2,5, 8, 11, ... is:​

Answer 1

Answer:

answer for the given problem is given

Answer 2

Answer:

ans. is this AP is 155.

Step-by-step explanation:

a = 2, d =3, n = 10

then we apply formula

Sn = n/2 {2a + ( n - 1 ) d }

put all the value in this eqn.

= 10/2 { 2×2 + ( 10 -1 ) × 3 }

= 5 { 4 + 9×3 }

= 5× 4 + 27

= 5× 31 【 by BODMAS 】

= 155. (ans)