Posted by **Soraya** on Sunday, August 23, 2009 at 2:52pm.

Determine the domain and range of

y= (radical) x-4

y= (radical) x^2-4

plz help me step by step. I just need to refreash my math, but i forgot how to find it

- Math Pre-Calc. -
**Damon**, Sunday, August 23, 2009 at 3:13pm
do you mean

y = sqrt(x-4) ???

if so the right side is real only for x>/= +4 so domain is all x >/= +4 and range is all positive y

If the second one is

y = sqrt (x^2-4)

then (x^2-4) is real only for |x|>/=2

so domain is all x </- -2 and all x>/=+2

and again y is always +

- Math Pre-Calc. -
**Soraya**, Sunday, August 23, 2009 at 3:40pm
how do u figures out the doamin and range???

## Answer This Question

## Related Questions

- math,correction - Can somoene helpme plz... Simplify radical 7 * radical 14 ...
- Math - The area of one of the faces of the cube below is x^2+2x+1 cm^2. Find an ...
- math,correction,plz - can someone correct these for me plz. Simplify by ...
- math,correction - Simplify by combining like terms. Problem #32 radical (63) - 2...
- Math - Find the domain of the following functions. 1. y= radical(x-3) - radical(...
- math - in the question 6radical x +3 radical y -2radical y +3 radical x -radical...
- math,correction,plz - Perform the indicated division. Rationalize the ...
- math, correction,plz - can someone correct these for me plz.... Problem#36 Use ...
- math,correction plz - can someone correct my math...thanks... Perform the ...
- math , help,algebra - i am up to this point in my problem but i don't know what ...

More Related Questions