# Algebra 2

Find the sum of the infinite series 1/3+1/9+1/27+... if it exists

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2. 👎 0
3. 👁 106
asked by Alexis
1. this is a GS where
a = 1/3
r =1/3

sum(infinite # of terms) = a/(1-r)
= (1/3)/(1 - 1/3)
= (1/3) / (2/3)
= (1/3)(3/2)
= 1/2

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posted by Reiny

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