1) Ifω=−1+√3i2 then (3+ω+ω2)4 is A) 16 B) -16 C) 16ω D) 16ω2 Answer: Option CExplanation:Let ω=−1+√3i2 Now, 1+ ω + ω2 = 0 and ω3= 1 then(3+ω+ω2)4 = (3+ω+3ω2+2ω-2ω)4 =(3+3ω+3ω2-2ω)4 = [3(1+2+ω2)-2ω]4 = (0-2ω)4 = 16ω4 = 16ω (ω3 = 1 )