The 5th term of an arithmetic progression is 12 and the 13th term is 28

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

Problem

The 5th term of an arithmetic progression is 12 and the 13th term is 28. Which of the following pairs of equations in the first term aa and common difference dd correctly represents this information? (a) a+5d=12,  a+13d=28a + 5d = 12,\; a + 13d = 28 (b) a+4d=12,  a+13d=28a + 4d = 12,\; a + 13d = 28 (c) a+4d=12,  a+12d=28a + 4d = 12,\; a + 12d = 28 (d) a+4d=28,  a+12d=12a + 4d = 28,\; a + 12d = 12

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