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(1+i)^(n1)+(1+i^3)^(n1)+(1+i^5)^(n2)+(1+...

`(1+i)^(n_1)+(1+i^3)^(n_1)+(1+i^5)^(n_2)+(1+i^7)^(n_2)` is a real number if

A

`n_1` is a positive integer

B

`n_2` is a positive integer

C

`n-1+1=n_2`

D

`n_1=n+2+1`

Text Solution

Verified by Experts

The correct Answer is:
A, B
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