For the given function, find the indicated function value.
-For $g ( x ) = \sqrt { x ^ { 2 } - 20 }$, find $g ( 2 )$.
A) $3 \sqrt { 5 }$
B) $2 \sqrt { 3 }$
C) Does not exist as a real number
D) $\sqrt { 7 }$

Question

Quizplus · Accepted Answer

Substituting $x = 2$ into the function $g(x) = \sqrt{x^2 - 20}$ gives $g(2) = \sqrt{2^2 - 20} = \sqrt{4 - 20} = \sqrt{-16}$, which is not a real number.

For the Given Function, Find the Indicated Function Value g(x)=x2−20g ( x ) = \sqrt { x ^ { 2 } - 20 }g(x)=x2−20​

For the Given Function, Find the Indicated Function Value $g ( x ) = \sqrt { x ^ { 2 } - 20 }$