## anonymous 4 years ago Which of the following correctly describes the domain of the function shown below? r(x)=2x/(x²-1) a. {x:x≠±1} b.{x: all real numbers} c.{x:x≠1} d.{x:x≠0}

1. anonymous

set the denominator = 0 and solve for x you will get $x^2-1=0$ $x^2=1$ $x=\pm1$ so all real numbers except 1 and -1

2. anonymous

wait so I'm confused which is it then?

3. anonymous

A