The first term of an arithmetic progression is 5 and the common difference is 3

MATHEMATICS · Single correct · A Level · Mathematics · Sequences and series · Sequences and series

Problem

The first term of an arithmetic progression is 5 and the common difference is 3. How many terms must be taken so that their sum equals 124? (a) 7 (b) 6 (c) 8 (d) 9

Related theory

Arithmetic Progressions
Functions
Algebra
Sequences and Series
Sum of first n terms of an AP

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