The ratio of the sums of the first 12 terms to the first 6 terms of an arithmetic…

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

Problem

The ratio of the sums of the first 12 terms to the first 6 terms of an arithmetic progression is 7 : 3. What is the ratio of the first term to the common difference? (a) 31:231:2 (b) 15:115:1 (c) 93:893:8 (d) 2:312:31

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