Find the range of each of the following functions.
$f (x) = x^{2} + 2, x$ is a real number .

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Solution

$f (x) = x^{2} + 2$ $x ϵ R$
$x^{2} \geq 0$
$x^{2} + 2 \geq 2$
$∴$ Range of $f (x) = (2, \infty)$

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