CPM Homework Help : CALC Problem 1-102

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1-102.

Find the domain of the following functions.

$f ( x ) = \frac { x - 2 } { x ^ { 2 } + 4 }$
Hint (a):
What values of $x$ would make $f(x)$ undefined or imaginary?
More Help (a):
When $x^2 + 4 = 0$ .
Answer (a):
$D = (−∞, ∞)$

$g ( x ) = \frac { \sqrt { x + 2 } } { x ^ { 2 } + x }$
Hint (b):
What values of $x$ would make $f(x)$ undefined or imaginary?
More Help (b):
When $x^2 + x = 0$ and when $x + 2 < 0$ .

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