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Consider the set A={1,-1,i,-i} of four r...

Consider the set `A={1,-1,i,-i}` of four roots of unity. Constructing the composition table for multiplication on S. which of the properties are true?

A

a binary operation on S

B

commutative on S

C

1 is the identity element

D

`i` is the identity element

Text Solution

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The correct Answer is:
A,B,C
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