HSA.SSE.B.4: Derive the formula for the sum of a finite geometric series (when the common ratio is not 1), and use the formula to solve problems.

Derive the formula for the sum of a finite geometric series (when the common ratio is not 1), and use the formula to solve problems.

Example Problems

Find the sum:

\sum_{k = 0}^{60} (4 - 3k) =

Find the sum:

\sum_{k=1}^{40} 2(-0.8)^{k-1}

Find the sum:

\sum_{k = 5}^{45} (3k - 28) =

Khan Academy Resources

Finite geometric series Finite geometric series in sigma notation Finite geometric series word problems Geometric series intro Finite geometric series word problem: mortgage Finite geometric series formula Geometric series introduction Geometric series with sigma notation Worked example: finite geometric series (sigma notation)Finite geometric series word problem: social media Geometric series word problems: swing Geometric series word problems: hike

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