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Unformatted text preview: a special formula for geometric sequences: Let’s go back and find the 10th term of our previous example 3) 180, 60, 20, … 1 ) (⋅ = n r a n A Find the common ratio and the 1st, 7th and 18th term of each sequence 1) 2) 3) 1 3 4 ) (⋅ = n n A 1 5 2 ) (⋅= n n A 1 2 1 180 ) ( ⋅ = n n A Homework page 427 2, 5, 11, 14, 20, 23, 25, 31, 36, 37, 42, 44...
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 Spring '09
 Johnson
 Algebra, Harshad number, Geometric progression

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