In an AP, the first term is and the common difference is . If the sum of the first…

MATHEMATICS · Single correct · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

In an AP, the first term is

5

and the common difference is

5

. If the sum of the first

n

terms is

275

, find

n

. (a)

11

(b)

7

(c)

10

(d)

9