8.3_bzca5e - Section 8.3 Geometric Sequences and Series...

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Section 8.3 Geometric Sequences and Series
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Geometric Sequences
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Example 2 1 In a geometric sequence the first term is 5 and the second term is 10, what is the common ratio? To find the common ratio r = . a a
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Example If in a geometric sequence the first term is 27 and the 1 common ratio is , what are the next 5 terms? 3
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The General Term of a Geometric Sequence
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Example Find the fifth term of a geometric sequence whose 1 first term is -64 and whose ratio is - . 2
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The Sum of the First n Terms of a Geometric Sequence
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Technology On the TI 83, 84 Calculator: 2nd - STAT (list)-MATH-#5 for Sum 2nd - STAT(list)-OPS-#5 for Seq Then in parenthese type: (expression, X, lower bound, upper bound, increment)
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Example Find the sum of the first 15 terms of the geometric sequence: -27, 9,-3,1,. .. (Round to the nearest hundredth.)
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Example 7 1 Find the following sum: 4 3 i i = g
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Find the total lifetime salary over a 30 year period that a school teacher is paid if her first annual salary was $7000 and the school system where she works
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This document was uploaded on 10/26/2011 for the course FKP bmfp at UTEM Chile.

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8.3_bzca5e - Section 8.3 Geometric Sequences and Series...

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