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Question

The value of (1+i31i3)6+(1i31+i3)6 is

A
2
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B
0
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C
2
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D
1
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Solution

The correct option is C 2
Replacing the above terms by cube root of unit w we get
(w2w)6+(ww2)6
=w6+1w6
=(w3)2+1(w3)2
=1+1
=2

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