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Suhail
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If a polynomial $p(z)$ omits a value than $p(z)-\dfrac{(1-e^{i\psi})}{n}zp^{\prime}(z)$ also omits that value

If a polynomial $p(z)$ of degree $n$ does not assume the value $w$ for $|z|<1$ that is $p(z)\neq w$ for $|z|<1.$ Show that $p(z)-\dfrac{(1-e^{i\psi})}{n}zp^{\prime}(z)\neq w$ for $|z|<1,\psi\in\mathbb{R}.$

I know at least two solution of this problem one by using Luguerre's theorem concerning the polar derivative of a polynomial and another by using a known result. But I want to find its direct solution with using known results.

Suhail
  • 197
  • 3