Question

For right/left hand limits how do you know if its positive infinity or negative...can someone explain the steps

Answer 1

Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

Answer 2

You can graph if you're in doubt.
Also, you can make a table which approaches the limit from a number which is BIGGER than that number or one which is SMALLER.

Example: limit 1 / x as x goes to zero... make a table:

x = 1
x = 0.1
x = 0.001
x = 0.0001
etc...

That is a "right limit" which is approaching from numbers LARGER than zero.

You can do the same with a left limit.


GRAPHING is probably the easiest to see, you just trace your finger on the graph from the left or right and see where it goes! :)

Answer 3

thank you!!

Answer 4

You're welcome. :) Two good places to graph:

1) http://www.wolramalpha.com and
2) http://www.geogebra.org

both are fantastic and FREE!