Domain and range - functions and relations :D
We're currently learning about Functions and Relations. Here is a question im unsure about. Help would be greatly appreciated.
Question: For the following function, state:
(i) the domain
(ii) the co-domain
(iii) the range
f : ( -¥ , 0 ) ® R , f (x) = 1/ Ö- x (one divided by square root of negative x)
I'm more concerned about how to do the range... because the answer says that the range is: ( 0 , ¥ ). How do you know with those types of graphs ( sqaure root underneath ) what the range is?
Help would be greatly appreciated! Thank- you :D