Solved

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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