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JEE Mains · Maths · STD 11 - 4.1 complex nubers

यदि समीकरण \(x ^4+ x ^3+ x ^2+ x +1=0\), के मूल \(\alpha, \beta, \gamma, \delta\) हैं, तो \(\alpha^{2021}+\beta^{2021}+\gamma^{2021}+\delta^{2021}\) बराबर है

  1. A \(-4\)
  2. B \(-1\)
  3. C \(1\)
  4. D \(4\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(-1\)

Step-by-step Solution

Detailed explanation

\(\alpha, \beta, \gamma, \delta\) root of the equation \(x^{4}+x^{3}+x^{2}+x+1=0\) Which are \(5^{\text {th }}\) roots of unity except \(1\). then \(\alpha^{2021}+\beta^{2021}+\gamma^{2021}+\delta^{2021}=\) \(\alpha+\beta+\gamma+\delta=-1\)
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