(a) The sum of the first terms of an arithmetic progression is and its first term is…

MATHEMATICS · Subjective · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

(a) The sum of the first

20

terms of an arithmetic progression is

210

and its first term is

2

. Find the common difference. (b) Using the value of the common difference obtained in part (a), calculate the

20^{\text{th}}

term of the progression.