Find the Specified Domain $( f g ) ( x )$

question 512

Multiple Choice

Find the specified domain.
-Find the domain of $( f g ) ( x )$ when $f ( x ) = \sqrt { 6 x + 9 }$ and $g ( x ) = \sqrt { 7 x - 9 }$

• A) \([ 0 , \infty )\)
• B) \(( - \infty , \infty )\)
• C) \(\left[ - \frac { 9 } { 7 } , \infty \right)\)
• D) \(\left[ \frac { 9 } { 7 } , \infty \right)\)

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