SOLUTION: The first term of a geometric progression is 5 and the fifth term is 1280, the common ratio is 4 Find the expression of the nth term?

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Question 1029025: The first term of a geometric progression is 5 and the fifth term is 1280, the common ratio is 4
Find the expression of the nth term?

Answer by ikleyn(52781) About Me  (Show Source):
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The first term of a geometric progression is 5 and the fifth term is 1280, the common ratio is 4
Find the expression of the nth term?
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1.  a%5Bn%5D = a%5B1%5D%2Ar%5E%28n-1%29 = 5%2Ar%5E%28n-1%29 is the expression for the n-th term.

2.  The info "and the fifth term is 1280" is excessive and is not used in this evaluation.


3.  To learn more on geometric progressions, see the lesson  Geometric progressions  in this site.