Attachment 25363

Somehow the methodology never makes sense to me.

I understand the idea behind it, but I never understand how one chooses the appropriate number for epsilon. Can someone break down how one would do this problem?

thanks!

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- October 23rd 2012, 06:45 AMkingsolomonsgraveeplison delta proof problem
Attachment 25363

Somehow the methodology never makes sense to me.

I understand the idea behind it, but I never understand how one chooses the appropriate number for epsilon. Can someone break down how one would do this problem?

thanks! - October 23rd 2012, 07:17 AMPlatoRe: eplison delta proof problem
- October 23rd 2012, 10:20 AMhollywoodRe: eplison delta proof problem
Right - you're given and you need to find a (which will be a function of ) that works. So you're doing the algebra backwards. Then when you write your proof, doing the algebra forward, it works. There's an excellent paper on how to do these proofs right here on the MHF Calculus forum - it's one of the "sticky" threads at the top.

- Hollywood