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Given A={x:x is a root of x^(2)-1=0} B={...

Given A={x:x is a root of `x^(2)`-1=0} B={x:x is a root of `x^(2)`-2x+1=0} then

A

A`cap`B=A

B

A`cup`B=`phi`

C

A`cup`B=A

D

A`cap`B=`phi`

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The correct Answer is:
C
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