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Question: please answer entirely and write neatly thank you...

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Please answer entirely and write neatly, thank you.
(5) Prove the following:
(b) If|c| = 1, and la| < 1, then lī I = 1 1-62
Ifal,a2. . . . ,anER, f p(s)-: + aばn-1+-..+an-l: + an, then p(z) = 0; i.e., non-real roots of P(z) come in complex conjugate pairs. (c) an E R, and 2o is a root o
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