Express the rule in function notation.
Square, subtract $5$ , then take the square root.
A)
$f ( x ) = \sqrt { x ^ { 2 } - 5 }$
B)
$f ( x ) = x - \sqrt { 5 }$
C)
$f ( x ) = x ^ { 2 } - 5$
D)
$f ( x ) = \sqrt { 5 x ^ { 2 } }$
E)
$f ( x ) = \sqrt { - 5 x ^ { 2 } }$

Question

Express the rule in function notation.
Square, subtract $5$ , then take the square root. 
A)
 $f ( x ) = \sqrt { x ^ { 2 } - 5 }$ 
B)
 $f ( x ) = x - \sqrt { 5 }$ 
C)
 $f ( x ) = x ^ { 2 } - 5$ 
D)
 $f ( x ) = \sqrt { 5 x ^ { 2 } }$ 
E)
 $f ( x ) = \sqrt { - 5 x ^ { 2 } }$

Quizplus · Accepted Answer

The function takes an input x, then squares it, subtracts 5, and finally takes the square root to obtain the output. This can be represented as f(x) = sqrt(x^2 - 5). Choice A matches this format.

Express the Rule in Function Notation 555 , Then Take the Square Root

Express the Rule in Function Notation $5$ , Then Take the Square Root