A kite is placed in a square, can you figure out one of its angles? I made a video for this "impossibly hard" problem from a New Zealand maths exam. But it turned out my proof had a flaw, which some of you pointed out in the comments! It turns out the problem…

2nd derivative of x^x, calculus 1 derivative problem, interesting derivative problem, last video: https://www.youtube.com/watch?v=l-iLg07zavc blackpenredpen,...

There are 7 indeterminate forms but 0^inf isn't one of them. In this video, I showed the idea that 0^inf goes to 0 but we would need to do more work for 1^inf.
Example of 1^inf doesn't go to 1: https://youtu.be/h6XGsdQ-Dfs


blackpenredpen,
math for fun…

Graph of x^x, (improved version, including 2nd derivative), graph of y=x^x, graph of f(x)=x^x, limit of x^x as x goes to 0+, https://www.youtube.com/watch?v=...

One of the most famous stories from the sort of cricket involves numbers, averages, and a duck.
More links & stuff in full denoscription below ↓↓↓

Archive footage courtesy of AP Archive:
https://www.youtube.com/c/aparchive

* Batting average list shown was…

Jen Rogers is a statistics researcher and lecturer at the University of Oxford.
https://www.jenniferrogers.co.uk/

We chat about how the scoring system works on Strictly Come Dancing (“Dancing With the Stars” in the USA and other countries). The UK system…

Proof by induction, example#2 blackpenredpen, Math for fun