The sum of the first terms of an arithmetic progression is and its first term is

MATHEMATICS · Multi-part · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

The sum of the first

12

terms of an arithmetic progression is

204

and its first term is

6

. Solve the following. (i) Determine the common difference of the progression. (ii) Find the sum of its first

20

terms.