If \\alpha and \\beta are the roots of x ^ { 2 } - 2 x + 4 = 0 then \\alpha ^ { n } + \\beta^ { n }

Correct Answer is : 2n+1cosnπ3

2 ^ { n } \cos { n \\pi } /{ 3 }

2 ^ { n } \sin { n \\pi } /{ 3 }

2 ^ { n+1 } \cos { n \\pi } /{ 3 }

2 ^ { n+1 } \sin { n \\pi } /{ 3 }

AP and TS EAMCET Engineering Model Paper 5

Question : 29 of 160

Marks: +1, -0

If α and β are the roots of x2−2x+4=0 then αn+βn

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