Find the sixth term of the geometric sequence with a1=-2 r=3 a6=?
回答 (2)
2016-08-03 2:25 am
rule
a(n)=a1 (r)^(n-1)
a(n)=a1 (r)^(n-1)
2016-08-03 2:47 am
a(6) = a1 r^(6-1) = -2(3)⁵ = -486
收錄日期: 2021-04-21 19:28:33
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160802182412AAvbTNr