Lesson 8.5a Exp and Log Equations.notebook
April 12, 2012
8.5 Exponential and Logarithmic Equations
Objectives:
• Be able to solve exponential equations
• Be able to solve logarithmic equations
Before it was easy
NOW ...
73x = 20
There is no way we can make
the bases the same :-(
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Lesson 8.5a Exp and Log Equations.notebook
April 12, 2012
Solve each exponential equation. Check your answer.
62x = 21
7x-3 = 25
7e2x + 2.5 = 20
To evaluate a log with any base you can use the
Change of Base Formula.
What is the value of?
log M
logbM = c
logcb
1. log37 2. log533
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Lesson 8.5a Exp and Log Equations.notebook
April 12, 2012
Solve each logarithmic equation. Check your answer
log(3x+1) = 3
log(7-2x) = -1
ln(3x-9) = 5
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