The first term of an arithmetic progression is 7 and its common difference is 3

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

Problem

The first term of an arithmetic progression is 7 and its common difference is 3. If the sum of the first nn terms is 205, determine nn. (a) 1212 (b) 1010 (c) 88 (d) 99

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