SOLUTION: the 6th term of a G.p is 1215. Given that the common ratio is 3, find the 9th term

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Question 916158: the 6th term of a G.p is 1215. Given that the common ratio is 3, find the 9th term
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
a%5Bn%5D+=+a%5B1%5D%2Ar%5E%28n-1%29
a%5B6%5D+=+a%5B1%5D%283%29%5E5+=+1215, a1 = 5
a%5B9%5D+=+5%283%29%5E%288%29 = 32,805