Need to solve a sum i/(1-i) + i/(1+i) Solution We need to find the result of i/(1-i) + i/(1+i) Now we have : i/(1-i) + i/(1+i) let\'s make the denominator equal. => i(1+i)/ (1+i)(1-i) + i (1-i)/ (1+i)(1-i) = [ i + i^2 + i - i^2 ] / (1+i)(1-i) =>2i / (1+i)(1-i) => 2i / 1^2 - i^2 => 2i / 1 +1 => 2i / 2 => i Therefore i/(1-i) + i/(1+i) simplified is i..