Answers

2016-07-24T18:32:51+08:00
484

Sn=A1-Anr÷1-r
r=common ratio
S5=4-(324)3÷1-3=4-974÷-2=-968÷-2=484


suppose to be, the common ratio is 3 multiply by 108 is equals to 324 so that the 5 term is 324.
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