Every differentiable function is continuous, but there are some continuous functions that are not differentiable.
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* Definition of continuous: • 2.14 The definition of continuity
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00:00 Introduction and definitions
00:47 Nondifferentiable definition
01:25 Corners
02:54 Vertical tangents
04:45 Vertical tangent conditions
05:48 CAUTION: tangent line vs. asymptote