Find $g \circ f$ And the Domain of the Composite Function $f ( x ) = x ^ { 2 } + 4 , g ( x ) = \sqrt { x }$

question 499

Multiple Choice

Find $g \circ f$ and the domain of the composite function.
$f ( x ) = x ^ { 2 } + 4 , g ( x ) = \sqrt { x }$

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