Find the Domain of the Given Function $$f ( x ) = \sqrt { x ^ { 4 } - 81 x ^ { 2 } }$$

question 51

Multiple Choice

Find the domain of the given function.
- $$f ( x ) = \sqrt { x ^ { 4 } - 81 x ^ { 2 } }$$

• A) \(( - \infty , - 9 ] \cup [ 9 , \infty )\)
• B) \(( - \infty , - 9 ] \cup [ 0 ] \cup [ 9 , \infty )\)
• C) \(( - \infty , \infty )\)
• D) \(( - \infty , - 9 ) \cup ( 9 , \infty )\)

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