The first term of an arithmetic progression is

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

Problem

7

. Its

n

th term is

39

. If the sum of the first

n

terms is

230

, calculate the common difference

d

. (a)

\dfrac{16}{5}

(b)

\dfrac{10}{3}

(c)

\dfrac{32}{9}

(d)

\dfrac{13}{3}