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July 23rd, 2017, 11:05 PM   #1
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Finite geometric series

I was working on this problem and I was not able to find a starting term to use with the summation formulas for geometric series.

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July 24th, 2017, 10:23 AM   #2
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The sequence has first term $(u_1 + u_1r)^2$, common ratio $r^2\!$, and $n - 1$ terms.
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July 24th, 2017, 12:44 PM   #3
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Start by writing the given terms of the second sequence in terms of $u_1$.
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July 26th, 2017, 12:49 PM   #4
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Okay that makes sense, Thanks.
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