Manipal Entrance Test 2014 Math Paper

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Question : 1 of 80

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If a=cos‌

2π

7

+i‌sin‌

2π

7

, then the quadratic equation whose roots are α=a+a2+a4 and β=a3+a5+a6, is

x2−x+2=0
x2+2x+2=0
x2+x+2=0
x2+x−2=0

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