Limits of polynomials at infinity

[DeepSeeded]

Help, I am infinitly confused :)

When solving the limit for this type and factoring the largest power of a variable in the polynomial in order to make its coefficient become a limit multiplied by another limit of Infinity I get lost. I just do not understand how (Infinity)(5 + Infinity + Infinity -Infinity) = (Infinity)(5). Where did all the other infinities go??

I hope that makes sense. There is much better examples on the first few problems on this page http://tutorial.math.lamar.edu/Classes/CalcI/LimitsAtInfinityI.aspx

 

[DeepSeeded]

Ahh, I found what I was doing wrong. lim(1/x) as x->Inf = 0 not Inf

I am new to this can you tell :P

0 + 0 + 0 + 0 is so much more understandable.

 

[sutupidmath]

what exactly are you asking for?

 

[Pere Callahan]

I think he solved his problem himself.