# geometric sequences

given the geometric sequences:9 90/17, 900/289

find an explicit formula for an, where the first term is a1=9
an=
a10=

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1. to find r, (90/17) / 9 = 10/17
and (900/289) / (90/17) = 10/17

a = 9
r = 10/17

term(n) = 9(10/17)^(n-1)

term(10) = 9(10/17)^9 = appr .07589

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posted by Reiny

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