When I try to demonstrate that lim (x^2)=4(adsbygoogle = window.adsbygoogle || []).push({});

x--->2

I found a different delta (delta=min{2-sqrt(epsilon-4),sqrt(epsilon+4)-2}, towards the one that is written in Demidovich´s book (delta=epsilon/5). Could someone help me?

Could someone tell me, too, a good algebra, calculus and real analysis book? Is it ok if i try analysis next semester absent a more advanced calculus (without calculus 2)? I need some books that explain polar coordinates too (good ones for beginner).

Thanks and sorry for my mathematical notation.

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# Demonstration analysis and good books?

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