Find the Domain Of $f$ $f ( x ) = \sqrt { x ^ { 2 } - 9 }$

question 23

Multiple Choice

Find the domain of $f$ . $f ( x ) = \sqrt { x ^ { 2 } - 9 }$

• A) \([ 3 , \infty )\)
• B) \(( - \infty , - 3 ] \cup [ 3 , \infty )\)
• C) \(( - \infty , - 3 ) \cup ( 3 , \infty )\)
• D) \(( - 3,3 )\)
• E) \([ 9 , \infty )\)

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