3 bad math notations
Let's address these 3 bad notations in math. They are not necessarily bad; it's just that sometimes we use the same notation for different things, which causes much confusion.
0:08 degree vs zeroth exponent
2:17 Coordinate (x,y) vs interval notation (a, b)
4:33 Reciprocal ( )^-1 vs inverse function f^-1
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