Question 610965
Please <A <HREF="http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=610967">click here</A> to see the solution to a similar problem. That problem does not have the same solution as yours but seeing the other solution should explain what you need to know to figure out this one. (Hint: Large positive x's will have different behavior than large negative x's.)