Calculus - How to find the value of a one sided limit using the equation

[AllyBeaulieu]

Thank you very much. This video is helping me a lot, as I am currently doing summer homework to prepare for my AP calculus class, and I have to teach myself. Very helpful video!

[odojoachim]

As a student of 1 year maths after a couple of hours spend on thinking how to simplify similar limit I must tell you that you saved my life :)

[drewwan]

it sounds like there is a party near by. idk

[manueljudi]

How did you get (1-x) in 3x? How it become 0? @ 4:36 and also how did you get the number -4.1? Is it random number? @ 8:03

[naomivdbh]

Omgg thank you! I got a differentiate/limit test tomorrow, I’m studying to become a math teacher and your videos really help me!!!

[Consolous]

Thanks for the vid although I don't get where you got the 3(1-x) in the second example.

[memeperor_]

youtube is such a sad place sometimes. imagine how many millions of people this channel has helped, yet it only has 191k subs :( and this video is from 2013... oh well, this video helped me a lot, thank you!

[krislam]

is there a more rigorous way of finding a one-sided limit? Like what if I am trying to use it to do the first derivative test for testing a function's extrema, I do not know whether the limit at c-0.1 and c-0.01 has the same sign.

tl;dr: is there a way to find the one-sided limit given the delta from the target value is arbitrarily small?

[krabbypatty]

i thought that limits involving absolute value had to be split up. [(x+4) if x>or=to 1] and [-(x+4) if x<1] can anyone clarify please?

[alwaysy]

How do you know that the function is with tangent slope of one?

[cadelucero]

Thank you!! This video was a BIG help!!

[raymundlsa]

you're the best teacher. thanks a lot.

why are you using two different x's at 7:47 ? (-4.1 and -4) I thought that the same x was used for both sides of the equation

[tohangeline]

I still don't understand why you wanted to use 4.1? Why cannot solve the question directly from the question? Why need to guess the x value? If don't guess, can I get my answer directly?

[guntukurojarani]

In the second problem you have calculated left hand limit but really ght hand limit doesn't exist so that the whole limit doesn't exist?

[joecell]

So that's how you make a damn bracket. Holy shit.

[fluffyfelix]

I have an examination in Basic Calculus 2 hours away from now. :/

[someoneuusedtoknow]

For the last problem, why the guy choose the value of x as x approaches -4+? He is approaching it from the right? Shouldn’t it be he used 3.9 rather than 4.1?

[mrs.carleshabutler]

where did the nine go? how did we get (x+3)(x-3)

[Jack-hbgp]

|-4.1+4|/-4.1+4 i not under stand please someone help me