8.2 Geometric Sequences

# 8.2 Geometric Sequences - r then for all n> 1 n u 1 1 n n...

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Geometric Sequences Section 8.2

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Geometric sequence – a sequence in which terms are found by multiplying a preceding term by a nonzero constant. { 3, 9, 27, ___,…} r = ____ The constant r is called the common ratio .
Recursive Form In a geometric sequence , for some and some nonzero constant r and all n > 2. { } n u 1 n n u ru - = { } n u

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Explicit Form If is a geometric sequence with common ratio

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Unformatted text preview: r , then for all n > 1, { } n u 1 1 n n u u r-= Partial Sums • The k th partial sum of the geometric sequence with common ratio is { } n u 1 r ≠ 1 1 1 1 k k n n r u u r = -= ÷- ∑ Joke Time What do you call 2 spiders who just got married? Newlywebs What did the Atlantic Ocean say to the Pacific Ocean? Nothing, they just waved....
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8.2 Geometric Sequences - r then for all n> 1 n u 1 1 n n...

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