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# Alg2 lesson 10-2

## on May 07, 2011

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## Alg2 lesson 10-2Presentation Transcript

• Exponential form log form
If bx = a, then x = logb a
b and x must be positive
b cannot equal 1
• Write in exponential form.
Write in exponential form.
exponent
base
Example 2-1a
• Write each equation in exponential form.
a.
b.
Example 2-1c
• Write in logarithmic form.
Write in logarithmic form.
exponent
base
Example 2-2a
• Write each equation in logarithmic form.
a.
b.
Example 2-2c
• Evaluate
Example 2-3a
• Evaluate
log10 1000 = y
1000 = 10y
103 = 10y
3 = y
Example 2-3b
• Evaluate
Evaluate
log9 92 = y
92 = 9y
2 = y
log5 53 = y
53 = 5y
3 = y
log7 712 = 12
Example 2-4a
• Evaluate
=
Example 2-4b
• Solve
Example 2-5a
• Solve
Example 2-5b
• Solve
Check 3:
Check 1:
or
Example 2-7a