## Precal Files: Logs

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Yes!  It’s my final unit for my Precal files!  See my entire year’s worth of stuff (and FAQs) on this page.

In my regular Precal classes, I normally start with an exponent review:

(doc file here-requires Running for a Cause font) (pdf file here)

Then we played a grudge match:

For my honors classes, we did exponent review during bellringers the week before and jumped right into graphing exponentials.

and solving exponentials:

Here’s the homework for the chapter:

Then it was time to break out the logs!!!

(file here) This year I want to be more explicit about how a log is the inverse/can undo an exponent. I think some of them still weren’t clear on that and what that meant for us. But meanwhile, we did some log graphs:

Then some log properties.

(file here) We did a nice worksheet using log properties to solve equations from a “Calculaughs” joke worksheet book for Algebra II/Precal.

Then we stepped up the solving logs a bit:

(file here) And did some group whiteboarding with these problems the next day:

Then some applications:

(file here) WARNING!!!  You see that nice pretty chart where we’re going to notice that as we compound more and more, it will equal the Pert formula?  Yeah, it breaks when you do the seconds one in a TI!  It looks like you actually make more than continuously compounding!  Wolfram Alpha saved the day, but it made for a great discussion! Just wanted to let you know ahead of time so you don’t freak out in the middle of class. 🙂

Then it was time for a study guide:

Because of some weird scheduling, after the test we spent a couple days on these advanced, precalculus-in-the-true-sense-of-the-word problems:

Well, that’s it! I’m done with my Precal files! Until I make something new when I start back next week. Stay tuned!

Category: Precal | Tags: , ,