Algebra 2: Resources and Extra Practice - 7.04 Sigma Notation

Algebra 2: Resources and Extra Practice

7.04 Sigma Notation

Essential Question:

How is sigma notation used to evaluate a series?

Lesson 7.04 Video - If video does not load correctly, Click Here to watch.

Khan Academy Resources

Summation notationSigma, Σ, is the standard notation for writing long sums. Learn how it is used in this video.

Worked example: arithmetic series (sigma notation)Sal evaluates the arithmetic series Σ(2k+50) for k=1 to 550. He does that using the arithmetic series formula (a₁+aₙ)*n/2.

Worked example: finite geometric series (sigma notation)Sal evaluates the geometric series Σ2(3ᵏ) for k=0 to 99 using the finite geometric series formula a(1-rⁿ)/(1-r).

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