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Specify the Domain Of (gf)(x)( g \circ f ) ( x )

Question 171

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Specify the domain of (gf)(x)( g \circ f ) ( x ) for the pair of functions f(x)=x+7 and g(x)=9x+7f ( x ) = \sqrt { x + 7 } \text { and } g ( x ) = 9 x + 7 . Please enter your answer in interval notation.

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