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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

krassi_holmz
2005-12-19 17:20:35

krassi_holmz
2005-12-19 17:19:03

But it won't work in all ways: It can bring to something like that:

that is no null at all the cases.

krassi_holmz
2005-12-19 17:17:11

If you are able to reduce your limit to sum of non-multiple limits you can find them and then you can sumarize them.

krassi_holmz
2005-12-19 16:29:09

I don't know better method, but here how I solve this:

,so we can proof it only for positive x and y and xy is positive so we can sqrt() it:
, but
but
and
, so
and

Ricky
2005-12-19 15:34:55

Is there any easy way to show the limit of a non-continuous function, that is, besides doing an epsilon-delta proof?

For example, how would you show:

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