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(1+i)^(2 n)+(1-i)^(2 n), n in z is...

`(1+i)^(2 n)+(1-i)^(2 n), n in z` is

A

a purely imaginary number

B

a purely real number

C

a non real complex number

D

a complex number z, such that `Re` `z= Im z`

Text Solution

Verified by Experts

The correct Answer is:
B
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