# Recent content by Cal124

1. ### Precise definition of the limit (epsilon-delta)

Sounds like maybe this forum isn't for me then, maybe when I'm better educated. Nothing was taken for granted, thanks to those who did help, I will study your advice and hopefully get it.
2. ### Precise definition of the limit (epsilon-delta)

Why is this 4? Is it not 2 or am i seeing this wrong? less than 1? I'm struggling with the, almost, canceling down from factoring to |x-2||x+2|< \epsilon/2 from this step I get really lost, as far as I'm aware the |x-2| is controlled by delta so i have to work with |x+2| by this i use the...
3. ### Precise definition of the limit (epsilon-delta)

That's the part I don't truely understand to be honest. The guide I read suggested as your trying to stay witching a small range 1 either side of the value (2) |x+2| is this wrong or have I (the more likely) misunderstood Thanks but I don't quite get your hint
4. ### Precise definition of the limit (epsilon-delta)

Not sure if this is right but thought I'd post my progress along with helpful sites in case somebody else has the same problem http://math.stackexchange.com/questions/950493/stuck-on-an-epsilon-delta-proof-where-i-let-delta-be-a-minimum-of-two-values...
5. ### Precise definition of the limit (epsilon-delta)

Sorry, I am really struggling with the precise definition of the limit. I have a specific question I'm trying to work out lim(x->2) (4x2+2)=18 skipping the introduction part any advice? I am just not sure how to get rid of the 2 value to re-arrange |(4x2+2)-18| to look like |x-2| |x-2|<delta...
6. ### Using the precise definition of a limit (epsilon & delta)

Awh sorry missed that. Yeah it's Lim. (4x^2 +2) = 18 X--> 2
7. ### Using the precise definition of a limit (epsilon & delta)

I'm trying to practise, precise definition of a limit (epsilon & delta) Just to check I'm along the right lines here's a previous question to the one I'm stuck on If epsilon > 0 then there is delta >0 ..... All that introduction stuff, then Lim x-> 2 (3x-1) =5 Hence |x-2| < delta then |3x -...
8. ### Finding the limit 0/0

Thanks! Much appreciated.
9. ### Finding the limit 0/0

Hopefully this will be okay to follow apologies if not, not sure how to write equations on here yet. >> [sqrt(2+2h) - sqrt(2)]/h . [sqrt(2+2h)+sqrt(2)]/sqrt(2+2h)+sqrt(2) >> 2+2h+[sqrt(2)sqrt(2+2h)]-[sqrt(2)sqrt(2+2h)]-2 h.sqrt(2+2h)+sqrt(2) >> cancels to 2h h.[sqrt(2+2h)+sqrt(2)] >> giving, as...
10. ### Finding the limit 0/0

I am really struggling with limits at the moment. Any help would be great! Thanks to anyone in advance if they take the time to read the rest of this. Basically i am struggling with finding the limit when using direct substitution provides 0/0 I (think) am fine with limits that involve quadratic...

Yeah
12. ### Finding a limit

That's a much easier way to grasp the concept, thanks! Will get reading! Sorry, I don't suppose you have any advice/similar PDF on the definition of a limit? I feel I'm getting there (although part of me feels it could all be wrong and I'm miles away)
13. ### Finding a limit

Thanks! Just clicked into place now, remember him explaining this now. There is some frustrating gaps in my knowledge due to a non traditional route to higher education. Thanks again!
14. ### Finding a limit

Apologies if this is in the wrong place. I'm struggling to understand a step in finding a limit Lim(x->0) x.sqrt(x+2) / sin(x) Following the given solution I get to the point where it's all divided through by x to give Sqrt(x+2) / sin x/x Which as approaching 0 gives Sqrt(2) / 1 = sqrt(2)...
15. ### Energy stored in a capacitor

Any idea where I've gone wrong?