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If roots of an equation x^n-1=0a r e1,a1...

If roots of an equation `x^n-1=0a r e1,a_1,a_2,..... a_(n-1),` then the value of `(1-a_1)(1-a_2)(1-a_3)(1-a_(n-1))` will be `n` b. `n^2` c. `n^n` d. 0

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