Table of contents

0. Review of Algebra4h 18m
1. Equations & Inequalities3h 18m
2. Graphs of Equations43m
3. Functions2h 17m
4. Polynomial Functions1h 44m
5. Rational Functions1h 23m
6. Exponential & Logarithmic Functions2h 28m
7. Systems of Equations & Matrices4h 6m
8. Conic Sections2h 23m
9. Sequences, Series, & Induction1h 22m
10. Combinatorics & Probability1h 45m

6. Exponential & Logarithmic Functions

Graphing Logarithmic Functions

College Algebra

6. Exponential & Logarithmic Functions

Graphing Logarithmic Functions

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1:33 minutes

Problem 95

Textbook Question

Given that log￬10 2 ≈ 0.3010 and log￬10 3 ≈ 0.4771, find each logarithm without using a calculator. log￬10 3/2

Verified step by step guidance

Recognize that the expression $ \log_{10} \frac{3}{2} $ can be rewritten using the quotient rule for logarithms: $ \log_{10} 3 - \log_{10} 2 $.

Substitute the given values into the expression: $ \log_{10} 3 \approx 0.4771 $ and $ \log_{10} 2 \approx 0.3010 $.

Calculate the difference: $ 0.4771 - 0.3010 $.

Simplify the expression to find the value of $ \log_{10} \frac{3}{2} $.

Conclude with the simplified result of the subtraction, which represents $ \log_{10} \frac{3}{2} $.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Properties of Logarithms

Logarithms have specific properties that simplify calculations. One key property is the quotient rule, which states that log_b(a/c) = log_b(a) - log_b(c). This allows us to break down complex logarithmic expressions into simpler parts, making it easier to compute values using known logarithms.

Change of Base Formula

The change of base formula allows us to express logarithms in terms of logarithms of a different base. Specifically, log_b(a) can be rewritten as log_k(a) / log_k(b) for any positive k. This is particularly useful when we have logarithm values for certain bases, enabling us to calculate logarithms for other bases using known values.

Approximation of Logarithmic Values

In this problem, we are given approximate values for log_10(2) and log_10(3). Understanding how to use these approximations effectively is crucial for solving logarithmic expressions. By substituting these values into the logarithmic properties, we can find the logarithm of more complex expressions without needing a calculator.