This lecture is such a jumbled mess.At @13:20 the prof. defines the mystery base e such that d/dx (e^x) = e^x.At @21:34 the prof. states that e is the base of the logarithm. (e is Euler's number)How does he equate the e at @13:20 with the e at @21:34? He assumes that they are the same just because he has used the same letter in both places. There is not explanation as to why the logarithm base 'e' is the same as the mystery base 'e' defined earlier.####[['lecture', 'Course_General_Feedback', 'NEG']]