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Hannah_Ahn
 3 years ago
Determine the 5th term of an infinite geometric series if S(infinite)=18 and r=2/3
Hannah_Ahn
 3 years ago
Determine the 5th term of an infinite geometric series if S(infinite)=18 and r=2/3

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Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0\[Sum = \frac{a}{1r}\] \[18=\frac{a}{1\frac{2}{3}}\] \[54=a\] \[a _{n}=a _{1}r ^{n1}\] \[a _{5}=54(\frac{2}{3})^{4}=54(\frac{16}{81})=\frac{32}{3}\]
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