Algebra 2 Notes 7-1

Intro to Logarithms

1. 1
Take a guess at what these 
statements are saying:
Now see if you can 
fill in the blanks:
Lsn 7­1: Let's start with a SUPER FUN puzzle!

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Def:  A  logarithm  is ___ ______________. Say it: __________________________ What it means: Say it: __________________________ What it means:

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3.786 
  + 5.419
BECAUSE MULTIPLICATION IS HARD.
but addition is pretty easy akshully.
    3.786 
x  5.419

4. 4
blame this guy "I was just 
trying to 
help! "

5. 5
Observe:  5.27 * 1.076 = 1000 * 1000000 = 1024 * 64 =
x    log 10(x)x    log 10(x)x    log 10(x)x    log 10(x)x    log 10(x)x    log 10(x)x    log 10(x)x    log 10(x)x    log 10(x)x    log 10

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16.6 * 42.2 Addition with a normal ruler: Multiplication with a Logarithmic Ruler:
1010101010 1010101010

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8. 8

9. 9
Switching Forms: "log form" "exponential form"

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Examples of inverse functions... Exponentiation also has an inverse function: (the inverse of sine is ________________)
(the inverse of square is _________________)
The inverse of is  Def:  

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