optional pages in Reading 26, then they include the material in problem sets

[monkeymath]

Hi folks,
I don’t know what to make of the optional pages in Reading 26 of the curriculum.
I thought optional was optional but then throughout the rest of the required reading, they are using formulas from the optional reading.
What is up with that??

 

[ltj]

When CFAI says optional, they mean “this was taught in a previous level and you should know it, but if you don’t: here’s a refresher”. They’re pretty nice folks.

 

[monkeymath]

Good to know ltj. I didn’t. Many thanks