Use properties of logarithms to condense each logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions without using a calculator. log 5 + log 2
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- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
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Properties of Logarithms
Problem 45
Textbook Question
Use properties of logarithms to condense each logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions without using a calculator. log2 (96) - log2 (3)
Verified step by step guidance1
Identify the logarithmic expression given: \(\log_{2}(96) - \log_{2}(3)\).
Recall the logarithmic property for subtraction: \(\log_{a}(x) - \log_{a}(y) = \log_{a}\left(\frac{x}{y}\right)\), where \(a\), \(x\), and \(y\) are positive and \(a \neq 1\).
Apply this property to combine the expression into a single logarithm: \(\log_{2}\left(\frac{96}{3}\right)\).
Simplify the fraction inside the logarithm: calculate \(\frac{96}{3}\) to get a simpler argument for the logarithm.
Rewrite the expression as \(\log_{2}(\text{simplified value})\), which is the condensed form with coefficient 1.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Properties of Logarithms
Properties of logarithms include rules such as the product, quotient, and power rules. These allow combining or breaking down logarithmic expressions. For example, the quotient rule states that log_b(A) - log_b(B) = log_b(A/B), which is essential for condensing expressions.
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Logarithmic Expression Simplification
Simplifying logarithmic expressions involves rewriting them as a single logarithm with coefficient 1. This often requires applying properties of logarithms and factoring numbers inside the log to simplify or evaluate without a calculator.
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Logarithms Introduction
Evaluating Logarithms Without a Calculator
Evaluating logarithms without a calculator involves expressing numbers as powers of the base or factoring to simplify. For example, recognizing that 96/3 = 32, and since 32 = 2^5, log_2(32) = 5, allows exact evaluation.
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