SOLUTION: If the sixth term of a sequence is 128 and the common ratio is 2, then what is the first term?

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Question 415774: If the sixth term of a sequence is 128 and the common ratio is 2, then what is the first term?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
If the sixth term of a sequence is 128 and the common ratio is 2
a%5Bn%5D+=+a%5B1%5D%2Ar%5E%28n-1%29
a%5B6%5D+=+128+=+a%5B1%5D%2A2%5E%285%29
128%2F32+=+a%5B1%5D
4+=+a%5B1%5D