Tuesday

July 29, 2014

July 29, 2014

Posted by **Jamie Lynn** on Tuesday, December 16, 2008 at 4:00pm.

example: f(x)=ab.solute value of x-3.

f(x)=square root 36-x^2

g(x)=-2x+2.

how would i know what the domain and range is of these. could i use a graphing calculator to tell me the domain and range??

- MAth -
**Reiny**, Tuesday, December 16, 2008 at 5:43pmy = │x-3│

becomes y = x-3 , y = -x+3

clearly I can use any x I feel like and get a y value.

so the domain is the set of real numbers

A nice way to get the range is to graph both lines and use only the part above the x-axis. These two intersect at (3,0) and form a V upwards

the range is any y ≥ 0

f(x) = √(36-x^2)

clearly if we use any value of x such that -6 < x < 6 we would be taking the square root of a negative, which would be undefined.

so the domain is x ≤ -6 OR x ≥ 6

the range is y ≥ 0

the last one is real easy.

in a simple way, the domain is set of all number you can use for x in your function without causing any undefined results,

the range is the set of resulting y values you get from those x's

- MAth -
**Jamie Lynn**, Tuesday, December 16, 2008 at 9:45pmso what is the answer to the last one?

**Related Questions**

math - how do i find the domain and range of equations? example: f(x)=ab.solute ...

Math (pre-calculus) - Hey! I have a domain and range question! I don't remember ...

precalculus check immediately - suppoe f is a function with domain [1,3]and ...

Help! Math (pre-calculus) - Oy! I don't understand this! How do you calculate ...

Algebra - 23. The ___ axis represents the independent variable. X? 21. Name the ...

math 116 - What is the difference between domain and range? The domain of a ...

math - i suck at domain and range.... this doesn't make any sense... a. Given ...

math (2nd Try) - You have 6 cups of sugar. It takes 1 cup of sugar to make 24 ...

Math - You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The...

alg 1 - Quadratic graphs and their properties: Identify the domain and range of ...