View Single Post
  #1  
Old November 1st, 2009, 09:21 PM
arze arze is offline
Member
 
Join Date: Jul 2009
Location: Singapore
Posts: 182
Country:
Thanks: 129
Thanked 10 Times in 10 Posts
arze is on a distinguished road
Default Find range of values

find the range of values for k for which the function
\frac{x^2-1}{(x-2)(x+k)}
where x is real, takes all real values.
I don't know how to start. Any pointers?
Thanks
Reply With Quote