WitCH 140: Honey, Don’t

We’re snowed with grading essays for the Evil Mathologer, and we’re trying very hard to get to a few larger posts. But for now, a quick WitCH. We don’t pay much attention to Foundation Mathematics, which is supposed to be the Easier Than Easy Maths Subject. Commenter Ron, however, emailed us about the following question on VCAA’s sample exam, posted last year. (See also this post.)

You have 90 seconds, and your time starts now.

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WitCH 138: Second Rate

Not counting the Witchfests on Nelson‘s Proof and Complex chapters, I don’t think we’ve had a textbook WitCH for quite a while. This one is hardly in the same league but it’s been on my to do list for a long time and it’s definitely a source of irritation. The topic came up in discussions with a colleague today, and I’m too busy and too tired to do the posts I should be doing, so this’ll do for now. It is an example from the differential equations chapter of Cambridge’s Specialist Mathematics 3 & 4, and it is related to this previous WitCH from the same text and chapter. As was the case with the previous WitCH, it is a representative, one of a type.

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