If \alpha,\beta are the roots of the equation x^2-2x+4=0, then \alpha^n+\beta^n = __________\times \cos {({n\pi}/3)}

AP EAMCET Engineering 22 Sep 2020 Shift 1 Paper

Section: Mathematics

Question : 57 of 160

Marks: +1, -0

If α,β are the roots of the equation x2−2x+4=0, then αn+βn = __________×cos‌(

nπ

)

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