In Exercises 50–53, use properties of logarithms to expand each logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.
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- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
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Properties of Logarithms
Problem 55
Textbook Question
Find each value. If applicable, give an approximation to four decimal places. ln (27 943)
Verified step by step guidance1
Recognize that the problem asks for the natural logarithm of the product \$27 \times 943\(, which can be written as \)\ln(27 \times 943)$.
Use the logarithm property that states \(\ln(a \times b) = \ln(a) + \ln(b)\) to rewrite the expression as \(\ln(27) + \ln(943)\).
Calculate or approximate each logarithm separately: find \(\ln(27)\) and \(\ln(943)\) using a calculator or logarithm tables.
Add the two values obtained from the previous step to get the value of \(\ln(27 \times 943)\).
If required, round the final result to four decimal places to provide the approximation.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Natural Logarithm (ln)
The natural logarithm, denoted as ln, is the logarithm to the base e, where e ≈ 2.718. It answers the question: to what power must e be raised to get a given number? Understanding ln is essential for evaluating expressions like ln(27 * 943).
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Logarithm Product Rule
The product rule for logarithms states that ln(a * b) = ln(a) + ln(b). This property allows simplification of the logarithm of a product into a sum of logarithms, making calculations easier and more manageable.
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Approximation and Rounding
When exact values are difficult to compute, approximations are used. Rounding to four decimal places means limiting the number to four digits after the decimal point, which is important for presenting answers clearly and consistently.
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