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Suppose $f(X) = (X − α)^r\cdot g(X)$, where $α ∈ \Bbb C$ is nonzero, $r ∈ \Bbb Z^+$, and $g ∈ \Bbb C[X]$ is nonzero. Prove that $||g|| < (1 + \deg g)\cdot (2 \max(1, |α|^{−1}))\cdot \deg f\cdot ||f||$

I wanted to try Newton's theory but failed. I am considering using substitution.

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    ∥⋅∥ mea$n$s the highest coefficie$n$t of monomial within the polynomial.2012-11-12

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