Logarithms.

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Presentation transcript:

Logarithms

What is a LOGARITHM? A logarithm is another way to represent an exponent. Video

Switch answer and exponent Drop the Drop the base Drop the

Try These- Rewrite as Logarithms Log381 = x 3 𝑥 = 81 4 5 = x 𝑥 7 = 128 Can you solve for x? Log4x = 5 Logx128 = 7

Try These- Rewrite as Exponents 𝟓 𝟐 =𝒙 Log5x=2 Log464=x Logx49=2 Can you solve for x? 𝟒 𝒙 =𝟔𝟒 𝒙 𝟐 =𝟒𝟗

Can you think of another irrational number that has its own symbol? Can you find e on your calculator? Pi π ~ 3.14

10 4 = x 𝑒 𝑥 = 5 log 1000 = 3 ln 7 = x log x = 4 ln 5 = x 𝟏𝟎 𝟑 = 1,000 Try These 10 4 = x 𝑒 𝑥 = 5 log 1000 = 3 ln 7 = x log x = 4 ln 5 = x 𝟏𝟎 𝟑 = 1,000 𝒆 𝒙 = 7

Assignment Handout Circles worksheet. Look at each exponential and logarithmic equation. Shade each matching pair the same color or pattern. Practice QUIZ

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