3.9 Continuous but not differentiable functions

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Every differentiable function is continuous, but there are some continuous functions that are not differentiable.

Related videos:

00:00 Introduction and definitions
00:47 Non-differentiable definition
01:25 Corners
02:54 Vertical tangents
04:45 Vertical tangent conditions
05:48 CAUTION: tangent line vs. asymptote
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thanks a lot, beautiful work, appreciate

annali
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Can someone give an example of cool unusual functions as described at 5:07?

khushaalnandwani
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How do you prove the condition at 5:05?

ameliamcintosh
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Dear sir, why is the second condition a little bit more stronger?

johanroypaul
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.75 speed for normal talking speed. Great vid btw

emeraldmasta
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Please try and reduce your talking speed

vidaafosaa