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In each paragraph 3 multiple choice questions have to be answered. Each question has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct.
Let a, b and c be three real numbers satisfying :
Let ω be the solution of x2−1=0 with lm(ω)>0. If a=2 with b and c satisfying (E), then the value of: is equal to :