Well since i was only at school monday, i don't know much. We learned domain and range.

3 types:

1. polynomial-an equation with no variables in the denominator.
domain is always (-infinity, + infinity)
range is (-infinity, + infinity) if odd.

2. square roots
domain: 1. set inside equal to 0 and solve for x.
2. set up a number line.
3. plug in numbers (use non-negative intervals)

range: [vertical shift, infinity)
**if square root of a number minus x^2 range= [0, +square root]

3. fractions
domain: 1. set bottom equal to 0 and solve for x.
2. set up intervals.

range: 1. take limit as x --> infinity
2. set up intervals

A FEW RULES:
-use brackets for everything EXCEPT asymtotes, +/- infinity, or circles.
--fractions always use parenthesis ( )

I'm pretty good at finding domain and range when i have a graph but when it gets to having to solve i have problems.
The using limit to find range is throwing me off?

All i know is when i get back to school i'll need major help!
i'm sure heather can help me :)