The sum of the first 20 terms of an arithmetic progression is 710 and the common…

MATHEMATICS · Single correct · A Level · Mathematics · Sequences and series · Sequences and series

Problem

The sum of the first 20 terms of an arithmetic progression is 710 and the common difference is 5. Find the first term. (a)

-24

(b)

-17

(c)

-12

(d)

-15