Geometry Joys, Milestones, Murderous Maths, Notes on everyday life, Simon's sketch book

Formula for e

Simon’s project in online at https://www.geogebra.org/classic/j29phpus
the second part of Simon’s project: https://www.geogebra.org/classic/wym3kvxf

I’ve worked out a formula for e!


This came up when I was looking for an antiderivative, if n isn’t equal to 1:

if n is equal to 1, then it’s suddenly a natural log!

But I’ve realized that if I change it only a tiny bit, it becomes a really famous existing formula for e:

Still impressive that you have worked it out all on your own, Simon!

Geometry Joys, Milestones, Murderous Maths, Notes on everyday life, Simon teaching, Simon's sketch book

Geometric Definition of e

The idea comes from a video by Mathologer. Simon sketches a geometric definition of the Euler’s number (e) using integrals. He messed up a little with the integral notation, but corrected it later (after we stopped filming). Please see the photos below: