Prentice Hall Algebra 2

7-4 Properties of Logarithms

Objective

To use the properties of logarithms

A solve it problem.
Image Long Description

You can derive the properties of logarithms from the properties of exponents.

Essential Understanding Logarithms and exponents have corresponding properties.

Here's Why It Works You can use a product property of exponents to derive a product property of logarithms.

Let x equals   log base b , m  and y equals   log base b , n .

table with 5 rows and 2 columns , row1 column 1 , m equals , b to the x , and , n equals , b to the y , column 2 cap definition of logarithm , row2 column 1 , m n equals , b to the x , middle dot , b to the y , column 2 cap write , m n . as a product of powers. , row3 column 1 , m n equals . b super x plus y end super , column 2 cap product cap property of cap exponents , row4 column 1 , log base b , m n equals x plus y , column 2 cap definition of logarithm , row5 column 1 , log base b , m n equals , log base b , m plus , log base b , n , column 2 cap substitute for . x , and , y . , end table
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Table of Contents

Prentice Hall Algebra 2 Chapter 1 Expressions, Equations, and Inequalities Chapter 2 Functions, Equations, and Graphs Chapter 3 Linear Systems Chapter 4 Quadratic Functions and Equations Chapter 5 Polynomials and Polynomial Functions Chapter 6 Radical Functions and Rational Exponents Chapter 7 Exponential and Logarithmic Functions Chapter 8 Rational Functions Chapter 9 Sequences and Series Chapter 10 Quadratic Relations and Conic Sections Chapter 11 Probability and Statistics Chapter 12 Matrices Chapter 13 Periodic Functions and Trigonometry Chapter 14 Trigonometric Identities and Equations Skills Handbook English/Spanish Illustrated Glossary Selected Answers Index Acknowledgments