Mathematics, 03.02.2020 18:51 Jabari1946
What is the sum of an 8-term geometric series if the first term is -11, the last term is 180, 224, and the common ratio is -4
Answers: 1
![S=a1[\frac{1-r^{n}}{1-r}]](/tpl/images/0497/4760/ca5d2.png)
![S=(-11)[\frac{1-(-4)^{8}}{1-(-4)}]](/tpl/images/0497/4760/603f8.png)
![S=(-11)[\frac{1-(65.536)}{5}]](/tpl/images/0497/4760/d31d6.png)
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What is the sum of an 8-term geometric series if the first term is -11, the last term is 180, 224, a...
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