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# FP1 - June 2011 Question 8 Watch

1. I understand that the 2 x asymptotes are x=+/- 2, but why is the y-asymptote y=0? why isn't it y=-1/4?
2. To be quite honest, i don't understand part b) either. :/

3. (Original post by Jasprar)

I understand that the 2 x asymptotes are x=+/- 2, but why is the y-asymptote y=0? why isn't it y=-1/4?
What happens to the value of y, as x goes to +/- infinity?
4. Aha, I see, hehe. What about part b.?
5. (Original post by Jasprar)
Aha, I see, hehe. What about part b.?
By best interpretation as to how this follows from part a) is:

You've split the x-axis into three parts divided by the asymptotic lines x=-2, and x=2.

If x<-2, or x>2, the function is always postivie, so you restricted to solutions in the range (-2,2), and here it's -ve.

And then proceed as normal in solving, bearing that in mind.

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