

Properties of Logarithms
Presentation
•
Mathematics
•
10th - 12th Grade
•
Medium
Standards-aligned
Christopher Fredericks
Used 15+ times
FREE Resource
13 Slides • 16 Questions
1
Let's keep practicing!

2
3
Poll
Let's get to some practice...
But FIRST!
What is your go to social app?
4
You can do it as many times as you like
You benefit the most by trying the questions honestly (don't just randomly tap/click or use outside resources!)
5
Open Ended
Warm Up: Rewrite the equation in exponential form.
log8(64)=2
6
Multiple Choice
Warm Up: Rewrite the equation in logarithmic form.
7b=a
logb(7)=a
log7(a)=b
log7(b)=a
logb(a)=7
7
Multiple Choice
Warm Up: Rewrite the expression in exponential form.
logy(z)=x
yx=z
xz=y
yz=x
zy=x
8
Multiple Choice
Why can't your nose be 12 inches long?
Because it would be a foot.
Pick the other option you silly goose.
9
Review those properties! Let's see if we can expand and condense some logarithms.
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11
Multiple Choice
log(5)+log(2) = ...
Or...I could CONDENSE the expression as:
log(7)
log(3)
log(2.5)
log(10)
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But being able to manipulate expressions will help simplify the process of some difficult concepts. Think of it like training your brain.
14
Multiple Select
You ready to practice? Check ALL the boxes to indicate that you are ready:
I have my log properties nearby.
I took a deep breath.
I told someone near me what my favorite animal is.
I CAN DO THIS
15
Multiple Choice
Hooray! LET'S GOOOOOOOO Use the change of base formula to rewrite the logarithm:
log7(8)
log(7)log(8)
log(78)
log(87)
log(8)log(7)
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Multiple Choice
Expand the logarithm: log(5⋅3⋅2)
log(30)
log(5)⋅log(3)⋅log(2)
log(15)+log(2)
log(5)+log(3)+log(2)
17
Multiple Choice
Condense the logarithm to a single logarithm. 2log(5)−log(6)
log(652)
log(112)
log(302)
log(65)2
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When we expand and condense logarithms, we want to do so fully!
Think about your order of operations to help you with your expansions and condensing. Certain operators will happen before others.
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20
Multiple Choice
Condense the logarithm to a single logarithm. 2[log(5)−log(6)]
log(652)
log(112)
log(302)
log((65)2)
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22
Multiple Choice
Condense to a single logarithm. 3log(11)+log(2)
3log(22)
log(113)+log(2)
log(113⋅2)
log(223)
23
Multiple Choice
Expand the logarithm. log((xy5)2)
2log(x)+5log(y)
2log(x)+10log(y)
10log(x)+2log(y)
2log(x)−10log(y)
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This would be a good time to stand up and stretch!
26
Multiple Choice
Expand the logarithm: log(y2x6)
2log(x)+12log(y)
6log(x)+2log(y)
12log(x)−2log(y)
6log(x)−2log(y)
27
Multiple Choice
Condense the logarithm. 21⋅log(a)+21log(b)+21log(c)
log([abc]2)
log(2c2b2a)
log(abc)
log(abc)
28
Multiple Choice
Expand the logarithm. log([6411]5)
5log(11)−20log(6)
20log(11)−20log(6)
20log(11)−5log(6)
5log(11)−4log(6)
29
You're done! How'd you do? Reflect on your process today.
Didn't get 100%? Why not do it again?
Let's keep practicing!

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