Evaluate
-If $f ( x ) = \sqrt { 2 x - 6 }$

question 282

Multiple Choice

Evaluate.
-If $f ( x ) = \sqrt { 2 x - 6 }$ , find the value of $f ( 21 )$ .

• A) 36
• B) 6
• C) \(\sqrt { 42 }\)
• D) 42

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