Could you explain me, what is limits, where are limits used, and how to do calculations with'em?

Question

anonymous · Answer

And, give examples too, plz.

anonymous · Answer

hmm when we do a limit we are recognizing that the point doesnt exist within the domain. however we are saying if we could put a point there where would the y value b

anonymous · Answer

like say:
(x^2+3x+2)/(x+2)
what is 
$$\lim_{x \rightarrow -2}$$

anonymous · Answer

Ok, If I give you x+y=2 and tell you to find area underneath the line from , x=0 to x=2
how would you find it?

anonymous · Answer

i dont think he/she is there yet

anonymous · Answer

or are u asking me?

anonymous · Answer

just trying to show him/her how limit are useful

anonymous · Answer

ı did'nt got it

anonymous · Answer

http://www.wolframalpha.com/input/?i=y%3D-x%2B2&t=crmtb01 as you can see , it is a triangle , so you may use triangle formula 1/2 b h

anonymous · Answer

ı dont got it 4real, just explin me more simple, with its theory...

anonymous · Answer

ok say u had:
$$\lim_{x \rightarrow -2} (x^2+3x+2)/(x+2)$$

anonymous · Answer

what u want to do is find a y value for the equation we have here. so we would plug it in and get:
0/0

anonymous · Answer

so if we were to graph this function there would b some kind of break in the function

anonymous · Answer

because we got 0/0 which means it is undefined

anonymous · Answer

at x=-2

anonymous · Answer

but suppose we wanted to know what the value would b if it wasnt undefined. suppose the value we needed to kno was where the undefined value would b

phi · Answer

Try watching Khan. He's not too bad. http://www.khanacademy.org/video/introduction-to-limits--hd?playlist=Calculus

anonymous · Answer

yes do that.

anonymous · Answer

well, thanks ^^