[SOLVED] right/left side limits

• Mar 3rd 2009, 09:14 PM
>_<SHY_GUY>_<
[SOLVED] right/left side limits
is there a way to find the right/left side limits of equtaions without using a graphing calculator, for example:

lim x-> 7/2 + int (2x-1)
• Mar 3rd 2009, 09:19 PM
Jameson
I think it would be good for you to learn Latex. Limits don't look very nice typed out like so. Click on this image to see how to make the basic setup:

$\lim_{x \rightarrow a} \frac{f(x)}{g(x)}$

What does "int" mean?
• Mar 3rd 2009, 09:27 PM
>_<SHY_GUY>_<
thats the problem, i dont understand what "int" is i know how it looks like but i dont see what to do with it

Quote:

Originally Posted by Jameson
I think it would be good for you to learn Latex. Limits don't look very nice typed out like so. Click on this image to see how to make the basic setup:

$\lim_{x \rightarrow a} \frac{f(x)}{g(x)}$

What does "int" mean?

• Mar 3rd 2009, 09:35 PM
Jameson
Quote:

Originally Posted by >_<SHY_GUY>_<
thats the problem, i dont understand what "int" is i know how it looks like but i dont see what to do with it

Well you're going to have to try to explain what you can. "int" normally means integral, but could mean integer. Integral seems more likely since this is a calculus/pre-calculus topic and integer makes so sense. It might be the greatest integer function, which looks like stairs. Anyway, I'm not a fortune teller and you're gonna have to try to do what you can to explain.
• Mar 3rd 2009, 09:38 PM
>_<SHY_GUY>_<
well "int" in the way that in the graph, it shows as "stairs" as you mentioned

Quote:

Originally Posted by Jameson
Well you're going to have to try to explain what you can. "int" normally means integral, but could mean integer. Integral seems more likely since this is a calculus/pre-calculus topic and integer makes so sense. It might be the greatest integer function, which looks like stairs. Anyway, I'm not a fortune teller and you're gonna have to try to do what you can to explain.

• Mar 3rd 2009, 09:45 PM
Jameson
Ok. Well assuming it's the greatest integer function (not the least integer function), this means that all decimals will round down to the previous integer (positive ones). So int(5.5)=5. This graph makes clear jumps, so limits can be seen easily. First consider the point f(7/2) - if it exists and what it is if so. Then since you are taking a right-sided limit look at points to the right of this. Remember that the limit is what value it is approaching, not necessarily what the value is at the point.
• Mar 3rd 2009, 09:51 PM
>_<SHY_GUY>_<
i think i confuse the actual value with the value it approaches...thank you