College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 4, Exponential and Logarithmic Functions - Chapter 4 Test - Page 327: 4

Answer

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Work Step by Step

Law of Logarithms: 1. $\log(AB)=\log A +\log B$ 2. $\log(A/B)=\log A -\log B$ 3. $\log(A^C)=C\log A$ 4. $\log_{A}B=\frac{\log_{C}A}{\log_{C}B}$ Properties of Loagrithms: 1. $\log_{a}1=0$ 2. $\log_{a}a=1$ 3. $\log_{a}a^x=x$ 4. $a^{\log_{a}x}=x$ a. From the properties of logarithms (4): $10^{\log36}=36$ b. From the properties of logarithms (3): $\ln e^3=3$ c. From the properties of logarithms (3): $\log_{3} \sqrt{27}=\log_{3}3^{3/2}=\frac{3}{2}$ d. From the law of logarithms (2): $\log_{2}80-\log_{2}10=\log_{2}(80/10)=\log_{2}8=\log_{2}2^3=3$ e. From the law of logarithms (4): $\log_{8}4=\frac{\log_{2}4}{\log_{2}8}=\frac{2}{3}$ f. From the law of logarithms (1): $\log_{6}4+\log_{6}9=\log_{6}36=\log_{6}6^2=2$
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