I'm really having trouble with this question...
When I solve it I find the answer to just be zero but apparently the answer is two or -2.
Find lim
x-> - infinity
Could somebody please explain to me how to do this type of question. I understand what to do when there are variables on the top, but since there is only a one I'm very confused.
I'm fairly new to this website so I dont know how to format all my algebra the way that you guys do =(. But this is my train of thought when I do the question:
1. Divide by highest power x in denominator.
(1/x^2)/-(((1/x^4)^1/2)((x^2+x)^1/2)+x/x^2)
2. Continue algebra (divide into radical).
(1/x^2)/-(((x^2/x^4 + x/x^4)^1/2) + x/x^2)
3. Simplify
(1/x^2)/-(((1/x^2 + 1/x^3)^1/2) + 1/x)
4. Plug infinity's in
0/-((0+0)^2)+0)
So basically I end up with 0/0.
I'm sorry that it's so hard to understand, I wish I could format it the way you do, but I can't figure it out.
Ah, that cleared it up for me, thanks =)
If you can still see this I have one quick question:
How in your third step did you get the 1/x when you took out the x^2?