Let 5 be a primitive 9th root of unity in C and consider the extension Q(5) of Q. Show that 5+ 5² + 5ª + 5³ + 5² + 5° = 0. [Hint: P9(x) = (x – )(x – (²)(x – (*)(x – ³)(x – (7)(x – (8)] -

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Let 5 be a primitive 9th root of unity in C and consider the extension Q(5) of Q.
Show that 5+ 5²+ 5ª + 5³ + 5" + 5° = 0.
[Hint: &3(x) = (x – S)(x – ¢²)(x – ¢*)(x – ¢°)(x – 5")(x – ç)]
Transcribed Image Text:Let 5 be a primitive 9th root of unity in C and consider the extension Q(5) of Q. Show that 5+ 5²+ 5ª + 5³ + 5" + 5° = 0. [Hint: &3(x) = (x – S)(x – ¢²)(x – ¢*)(x – ¢°)(x – 5")(x – ç)]
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