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Assertion (A): If n is a multiple of 6 and alpha, betaare the roots of x^(2) + x +1=0 then (1+alpha)^(-n)+ (1+beta)^(-n)=2 Reason (R) : The roots of x^(2) + x + 1= 0 are omega, omega^(2) and omega^(n), omega^(2n)= 2 when n=3k, k in z |
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Answer» Both A, R are TRUE and R EXPLAIN Assertion |
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