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Nov
29
comment Limit of $1/x^2$ - Apostol 3.2, Example 4
Oh! I think I get it. Any neighborhood N(0) will contain points such that 0<x<{1\over A+2}, and for those points f(x) > A+2. You can't get around that, no matter what δ you choose. What makes me sure that I get it is that now I don't understand why I didn't see that in the first place.
Nov
29
comment Limit of $1/x^2$ - Apostol 3.2, Example 4
On reflection, I'm not sure either. This is helping, though. Thanks!
Nov
29
comment Limit of $1/x^2$ - Apostol 3.2, Example 4
Thanks for the formatting. I briefly tried to get it into LaTex, but I gave up after nothing worked. Haha. I've tried to ask questions where I didn't explain as much, and the person I was asking either refused to help or started talking about a part of the problem that I wasn't asking about. In this case, I had already burned through all of my mathy friends, but they are all at least two years out from real analysis, and couldn't help very much. They did help me get this far, though.
Nov
29
comment Limit of $1/x^2$ - Apostol 3.2, Example 4
I think I get it. Is this like saying that for a given δ1 such that for 0 < x < δ1, if δ1 does not work, than no δ > δ1 will work?
Nov
29
awarded  Student
Nov
29
asked Limit of $1/x^2$ - Apostol 3.2, Example 4
Oct
9
awarded  Supporter
Sep
29
answered Determining the truth value of a statement
Sep
26
answered Intuitive way to find the graph of a derivative?
Sep
19
awarded  Editor
Sep
19
revised Proof Visualization
added 71 characters in body
Sep
19
asked Proof Visualization