# Thread:

1. ## Domain Rule

If I am trying to calcuate the domain. There is an absolute value, so would I set the part inside the absolute value brackets to: greater than or equal to zero, greater than zero, or not equal to zero. Thanks for the help.

2. Originally Posted by qbkr21
If I am trying to calcuate the domain. There is an absolute value, so would I set the part inside the absolute value brackets to: greater than or equal to zero, greater than zero, or not equal to zero. Thanks for the help.
Perhaps it would help if you posted the function...

-Dan

3. I just looking for a general rule...

denominator: =/ (not equal to zero)
square root: >= (greater than = to)
log:> (greater than)
absolute value: ?

4. Originally Posted by qbkr21
I just looking for a general rule...

denominator: =/ (not equal to zero)
square root: >= (greater than = to)
log:> (greater than)
absolute value: ?
Then consider the archetype:
$y = |x|$

This function is defined on all real numbers, so the domain is $( -\infty, \infty)$. The basic idea is that there is a y value for every real x value.

-Dan

5. Thanks
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