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# Series Sums and Gauss' Formula

## Addition of terms in a series and formula for adding positive integers.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Series Sums and Gauss' Formula

Calculating the sum of the terms in a series.

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• Video

## Finding the Sum of a Finite Arithmetic Series

Shows two formulas to find the sum of a finite arithmetic series and works through two examples of finding sums.

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• Practice
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