GRADE 10 MATH · CHAPTER 1

Algebra & functions

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  1. Functions

    Sum an arithmetic sequence

    Use equal-sum pairs to find a finite arithmetic series.

AN EXAMPLE FROM THIS CHAPTER

Find the sum of the first 5 terms of an arithmetic sequence whose first term is 2 and common difference is 3.

Show answer & explanation

40

The last term is 14. Sum = 5(2+14)/2 = 40.

Curriculum & source notes

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