The first term of an arithmetic progression is 5 and its common difference is −2

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

Problem

The first term of an arithmetic progression is 5 and its common difference is −2. Which of the following gives the n-th term ana_n of this progression? (a) an=5+2(n−1)a_n = 5 + 2(n - 1) (b) an=5−2na_n = 5 - 2n (c) an=5−2(n−1)a_n = 5 - 2(n - 1) (d) an=−2+5(n−1)a_n = -2 + 5(n - 1)

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