col2lttyjeZebrea col2lttyjeZebrea

24-10-2016
Mathematics

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Given a term in a geometric sequence and the common ratio find the first five terms, the explicit formula, and the recursive formula. a1=4,r=5

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apologiabiology apologiabiology

25-10-2016

explicit
an=a1(r)^(n-1)
an=4(5)^(n-1)

recursive
[tex]a_n=5a_{n-1}[/tex] where a1=4

first 5 terms are
4,20,100,500,2500

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