Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Promoted
In the geometric sequence, the common ratio is −2 and the 5th term is 72. What is the second term?
1 Answer
Relevance
- Jeff AaronLv 711 months agoFavorite Answer
r = -2
t(5) = 72
t(n) = ar^(n - 1)
t(5) = a(-2)^(5 - 1) = 72
a(-2)^4 = 72
16a = 72
a = 72/16
a = 4.5
t(n) = 4.5(-2)^(n - 1)
t(2) = 4.5(-2)^(2 - 1)
t(2) = 4.5(-2)^1
t(2) = 4.5(-2)
t(2) = -9
Still have questions? Get your answers by asking now.