A) 2
B) 3
C) 4
D) 5
Correct Answer: A
Solution :
\[{{\left( \frac{i-1}{i+1}\times \frac{i-1}{i-1} \right)}^{n}}={{\left( \frac{-2i}{-2} \right)}^{n}}={{i}^{n}}\] Hence, to make the real number the least positive integer is 2.You need to login to perform this action.
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