How do you find out the domain of a function?

<p>Im really really weak in this math area and I was wondering if there was a tutorial or some tips to find out the domain of functions.</p>

<p>Thanks</p>

<p>the domain is any value you can plug in for x that will give out a real number for y value.</p>

<p>Domain</a> and Range - Free Math Help</p>

<p>Visual</a> Calculus - Drill - Domains of Functions</p>