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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? 1 2 4
If the sixth term of a sequence is 128 and the common ratio is 2, then the first term is 4. 128 = a1 * 2^(6-1); 128 = a1 * 2^5; 128 = a1 * 32; a1 = 128/32; a1 = 4
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Asked 1/15/2013 12:18:50 PM
Updated 7/20/2014 2:55:58 PM
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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.
128 = a1 * 2^(6-1); 128 = a1 * 2^5; 128 = a1 * 32; a1 = 128/32; a1 = 4
Added 7/20/2014 2:55:58 PM
This answer has been confirmed as correct and helpful.
Confirmed by sujaysen [7/20/2014 2:57:34 PM]
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