MCQ
If $n$ is a positive integer, then $\Big(\frac{1+\text{i}}{1-\text{i}}\Big)4\text{n}+1$ is equal to:
  • A
    $1$
  • B
    $-1$
  • $i$
  • D
    $-i$

Answer

Correct option: C.
$i$

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