# [GRAPH] What are the domain and range of f -1? (domain) (range)

• Sep 15th 2009, 02:05 PM
crystaltear
[GRAPH] What are the domain and range of f -1? (domain) (range)
http://i29.tinypic.com/zmckki.jpg

What are the domain and range of f ^ -1? (It's an inverse right?)

I got
Domain : (-INFINITY, INFINITY)
Range : (-INFINITY, INFINITY)
Is this correct?
• Sep 15th 2009, 02:13 PM
pickslides
The domain of \$\displaystyle f\$ = the range of \$\displaystyle f^{-1}\$

The range of \$\displaystyle f \$ = the domain of \$\displaystyle f^{-1}\$

Your answer could be correct. What is \$\displaystyle f\$ ?
• Sep 15th 2009, 02:15 PM
crystaltear
Quote:

Originally Posted by pickslides
The domain of \$\displaystyle f\$ = the range of \$\displaystyle f^{-1}\$

The range of \$\displaystyle f \$ = the domain of \$\displaystyle f^{-1}\$

Your answer could be correct. What is \$\displaystyle f\$ ?

lol i know what, but i want to know what is my boo boo here :) can u tell? so i can get the answer right? thanks! (Rofl)
• Sep 15th 2009, 03:13 PM
skeeter
Quote:

Originally Posted by crystaltear
http://i29.tinypic.com/zmckki.jpg

What are the domain and range of f ^ -1? (It's an inverse right?)

I got
Domain : (-INFINITY, INFINITY)
Range : (-INFINITY, INFINITY)
Is this correct?

if f is restricted to the values on the graph, then the domain of f is [-3,3] and the range of f would be [-1,3].

... if the function continues outside the visible graph, then there is no way to tell w/o more information about f.
• Sep 15th 2009, 04:55 PM
crystaltear
Quote:

Originally Posted by skeeter
if f is restricted to the values on the graph, then the domain of f is [-3,3] and the range of f would be [-1,3].

... if the function continues outside the visible graph, then there is no way to tell w/o more information about f.

thanks i got the first part right but [_,3] domain and [_,3] I didn't get the x for both of them right...

:(
• Sep 15th 2009, 05:33 PM
skeeter
Quote:

Originally Posted by crystaltear
thanks i got the first part right but [_,3] domain and [_,3] I didn't get the x for both of them right...

:(

what did you answer?
• Sep 16th 2009, 06:25 AM
greenbee
Quote:

Originally Posted by skeeter
what did you answer?

i have this problem and I dont understand it to!!!