Precalculus Examples

$x < 5$ , $x > 2$

The union consists of all of the elements that are contained in both interval.

All real numbers

interval notation: $(- \infty, \infty)$

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$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$