http://ocw.mit.edu/courses/mathemat...rules/session-3-derivative-as-rate-of-change/(adsbygoogle = window.adsbygoogle || []).push({});

Hi so i just finished watching this lecture and i'm confused about why

lim

x->x0 (x-x0) = 0

It is in the last 5 minutes of the lecture.

Thanks in advance!

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# Differential = continuity theorem

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