Complex NumbersHard
Question
The smallest positive integer n for which 
= 1, is
= 1, isOptions
A.8
B.16
C.12
D.None of these
Solution
Since, = 1 ⇒ 
⇒
⇒ in = 1
The smallest positive integer n for which in = 1 is 4
∴ n = 4
= 1 ⇒ ⇒
⇒ in = 1 The smallest positive integer n for which in = 1 is 4
∴ n = 4
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