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Let \(a_1,a_2,\dots,a_n\) be the \(n^\text{th}\) roots of unity and let \(b_1,b_2,\dots,b_{n+1}\) be the \((n+1)^\text{st}\) roots of unity. Compute \(\frac{a_1a_2\cdots a_n}{b_1b_2\cdots b_{n+1}}.\)
 

 Jan 13, 2020
 #1
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The answer is 15.

 Jan 14, 2020
 #2
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How did you get that???

Guest Jan 14, 2020

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