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Maths-

General

Easy

Question

If $X$ and $Y$ are two sets, then $X intersection left parenthesis Y union X right parenthesis ´$ equals

$X$
$Y$
$ϕ$
None of these

The correct answer is: $ϕ$

We have,
$X intersection open parentheses Y union X close parentheses to the power of ´ end exponent equals X intersection open parentheses Y to the power of ´ end exponent intersection X to the power of ´ end exponent close parentheses equals open parentheses X intersection X to the power of ´ end exponent close parentheses intersection Y to the power of ´ end exponent equals ϕ intersection Y to the power of ´ end exponent equals ϕ$

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