Change of plans: Arithmetic series

[meep]

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I figured I'd close out my little series on summation for now (I'll get to geometric series next on that, but I've got some other fish to fry before then.)

The next video after this (because I've already produced it, but will post tomorrow) is on what doing math is really like (I do a geometry problem that had stumped me at CTY... well, for about an hour.) Then I'll get to the irrationality of the square root of 2.