discontinous funtions as asymptotes

[allukes]

I am not understanding how to figure of if the asymptote is a negative infinity or a positive infinity

such as:
x+5
x-2
and it asks me to find lim
x -> 2[sup:3zue7ta1]-[/sup:3zue7ta1]

I have no idea how to approach this problem because it seems the program that I am using (A+) doesnt give a very good description on how to solve it.

 

[Deleted member 4993]

I am not understanding how to figure of if the asymptote is a negative infinity or a positive infinity

such as:
x+5
x-2
and it asks me to find lim
x -> 2[sup:2x8bxhpk]-[/sup:2x8bxhpk]

I have no idea how to approach this problem because it seems the program that I am using (A+) doesnt give a very good description on how to solve it.

Just make table and think about it

.....x.................y
     0               -5/2
     1               -6
    1.5             -13
   1.75             -27
   1.9             -69

Where do you think you are going (+inf. or -inf.)- as you are approaching 2 (from "less than 2 side) ?

 

[allukes]

thank you i understand it better
that if the lim given has a n[sup:32xixeis]-[/sup:32xixeis] then all my [x] varibles are lower then the number given and that would give me my [y] varible and if my [y] varible gets smaller then i know that it would be a positive infinity and if they get bigger then it would be a negative infinity.
correct?