Find the Function $f \cdot g$ And Its Domain If $f ( x ) = \sqrt { x + 7 }$

question 108

Multiple Choice

Find the function $f \cdot g$ and its domain if $f ( x ) = \sqrt { x + 7 }$ and
$g ( x ) = \sqrt { x - 7 }$ .0

• A) \(\sqrt { x ^ { 2 } - 49 }\)
• \(D = [ 7 , \infty )\)
• B) \(\sqrt { x ^ { 2 } - 49 }\)
• \(D = [ - 7 , \infty )\)
• C) \(\sqrt { x ^ { 2 } + 49 }\)
• \(D = [ - 7 , \infty )\)
• D) \(\sqrt { x ^ { 2 } + 49 }\)
• \(D = [ 7 , \infty )\)

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