Question -10

Algebra Level 3

If 1,a1,a2,,an11,a_1,a_2,\ldots,a_{n-1} are the nn-th roots of unity, then find the value of (2a1)(2a2)(2a3)(2an1).(2-a_1)\cdot(2-a_2)\cdot(2-a_3)\cdots(2-a_{n-1}).


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