A Monday In Review

Happy Snow Day Everyone!

I'm not sure if you do a scribe post for test day... But I guess its better safe than sorry.
As you all know, we had a test on Monday, which I thought may have been the hardest one yet. This was our Unit 3 test, and focused on Exponential and Logarithmic Functions. Mr. Obrien's tests seem to follow a pattern, I get around 2 right, and have a good idea on the rest of them, but can never get them just right.

These are what I thought were the hardest problems:

#8.
Select the values for a and b, with a>b, such that log base b of a is less than zero. Justify your choice for a and b.

I felt that I was pressed for time on this, and guessed that using negative numbers would be a loophole. I chose a to be -2 and b to be -3. However, this was marked wrong. I'm not sure exactly what I could do to fix this, but this would be a good question to ask on the etherpad that Mr. Obrien has set up for Supercorrection Problems.
(http://etherpad.com/jjNOAl9LoD)

#11.
Solve the following equation. (Hint: consider using a graphic method)

On this problem, I guess that I couldn't quite wrap my brain around what he was trying to ask. You see, the hint was to use a graphic method, but there was no y-variable, so I had no idea how you would graph something like this. I guess my problem on this was the lack of the concept needed to solve this problem, and it just didn't quite "click". This would be another good question for the etherpad.

In the end, this test was difficult, but with time well spent on supercorrections, along with the etherpad (which should ease the task substantially), I'm sure that we can all be adequately prepared for the followup test, which occurs on the 23rd.

HW for friday:
Work on your Supercorrections and your quarter project.

ENJOY YOUR SNOWDAY!