That was a pretty good brain teaser. I totally missed the divide by zero and was getting worried for a second that the universe didn’t make sense!
I blame it on Rocky - my HS math teacher.
Sadistic SOB. LOL!
OBTW, whenever a mathematician says “It should be obvious to the casual observer...”, here are a few interpretations:
1. I just pulled a fast one [which I did...]
2. It is beyond the scope of this class [I have no clue what I am doing...]
3. Then, a miracle occurs...[I have no clue what I am doing...]
4. Etc. Get a grad student to explain it, I have to hit the bar.