# 9/12/16 — Happy Geometric Mean Day!

Happy Geometric Mean Day! The *geometric mean* of two numbers *a *and *b* is

which makes today a Geometric Mean Day!

A consequence of this is that the numbers in today’s date form a *geometric progression*

and

and here is one way to visualize that relationship

## 2 Comments

## A former student · September 12, 2016 at 3:48 pm

I was recently asked “Was ESET a bad program or a good program last year?”

“Yes,” I replied.

The crowd laughed, but I was a bit saddened when I realized they didn’t understand the joke the way a mathematician does, and merely thought I was being inane. One lass even asked “are you a poli-sci major?” in a true bout of irony.

## MrHonner · September 12, 2016 at 9:14 pm

The crowd never understands the joke well enough. Don’t hold it against them.