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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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Asked 1/15/2013 12:19:02 PM
Updated 2/3/2015 11:33:47 PM
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User: If the sixth term of a sequence is 128 and the common ratio is 2, then what is the first term?

Question
Asked 1/15/2013 12:19:02 PM
Updated 2/3/2015 11:33:47 PM
1 Answer/Comment
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If the sixth term of a sequence is 128 and the common ratio is 2, then the first term is 4 .
If the first term is a1
a1*2^(6 - 1) = 128
a1*2^5 = 128
a1 = 128/32
a1 = 4
Added 2/3/2015 11:33:47 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [2/3/2015 11:53:49 PM]
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