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Let `alpha` and` beta` be the roots of the equation `x^(2)+x+1=0` . The equation whose roots are `alpha^(19)` and `beta^(7)` is

A

`x^(2)-x-1=0`

B

` x^(2)-x+1=0`

C

`x^(2)+x-1=0`

D

`x^(2)+x+1=0`

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The correct Answer is:
A
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