1
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language

The smallest positive integer n for which

$\rm \left(\frac{1-i}{1+i}\right)^{n^2}=1$

where i = √-1, is

A
2
B
4
C
6
D
8
2
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
If Z = 1 + i, where i = √-1, then what is the modulus of $\rm z+\frac{2}{z}?$
A
1
B
2
C
3
D
4
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