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  4. Given A = x | x is a root of x2 - 1 =0 B = x | x is a root of x2 - 2x + 1 = 0 . Then

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Q. 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

Odisha JEEOdisha JEE 2010Sets

Solution:

$A = \{1, - 1\}, B = \{1\}. \therefore \, A \,\cup\,B = \{1, - 1\} = A$.