JEE Main 2003Annual, Paper 1MathematicsMediumComplex Numbers and Quadratic Equations264× since 2002If (1+i1−i)x=1{\left( {{{1 + i} \over {1 - i}}} \right)^x} = 1(1−i1+i)x=1 then :AOption A. x = 2n + 1, where n is any positive integerBOption B. x = 4n , where n is any positive integerCOption C. x = 2n, where n is any positive integerDOption D. x = 4n + 1, where n is any positive integer.CheckSkip · show solution