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Common Logarithmic Function
The common logarithmic function is a logarithmic function where the base is exactly . It is defined as , where . By mathematical convention, when the base of a logarithm is , it is typically not written. Therefore, the function is generally expressed simply as . If a logarithm is written without an explicit base, it is always assumed to be . The logarithmic equation is mathematically equivalent to the exponential equation .
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Intermediate Algebra @ OpenStax
Ch.10 Exponential and Logarithmic Functions - Intermediate Algebra @ OpenStax
Algebra
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Equivalence of Logarithmic and Exponential Equations
Shape of the Graph of a Logarithmic Function where
Point on the Graph of a Logarithmic Function
Point on the Graph of a Logarithmic Function
Domain of a Logarithmic Function
Range of a Logarithmic Function
Vertical Asymptote of the Graph of a Logarithmic Function
Natural Logarithmic Function
Common Logarithmic Function
Quotient Property of Logarithms
Power Property of Logarithms
Example 10.31: Using the Quotient Property of Logarithms
Try It 10.61: Writing Logarithms as a Difference of Logarithms
Try It 10.62: Applying the Quotient Property of Logarithms
Example 10.33: Expanding a Logarithm Using the Product and Power Properties
Try It 10.65: Expanding a Logarithm Using the Product and Power Properties
Try It 10.66: Expanding a Logarithm Using the Product and Power Properties
Product Property of Logarithms
Inverse Properties of Logarithms
Logarithm of 1 Property
Logarithm of the Base Property
Example 10.34: Expanding a Logarithm with a Radical
Try It 10.67: Expanding a Logarithm with a Radical
Try It 10.68: Expanding a Logarithm with a Radical
Condensing Logarithmic Expressions
Mirror Image Relationship between Logarithmic and Exponential Functions
-intercept of the Graph of a Logarithmic Function
One-to-One Property of Logarithmic Equations
Shape of the Graph of a Logarithmic Function where
-intercept of the Graph of a Logarithmic Function
As a data analyst at your company, you are modeling the growth of customer acquisitions using the exponential function . To determine the specific timeframe needed to reach a target number of customers, you must use the logarithmic function. Match the following logarithmic terms used in your analysis with their correct mathematical definitions or requirements.
A marketing specialist is analyzing the growth of a social media campaign. The reach of the campaign is modeled by the exponential function , where is the total reach and is the time in hours. To find the time required to reach a specific audience size, the specialist must use the inverse function. Which of the following is the correct logarithmic expression for ?
In a corporate research setting, a scientist is using the logarithmic function to analyze experimental data. True or False: This function is formally defined as the inverse of the exponential function and is defined for all real values of .
Defining Logarithmic Functions for Financial Modeling
Defining Logarithmic Functions for Operational Modeling
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Example 10.26: Calculating the Decibel Level of Earphones
Try It 10.51: Calculating the Decibel Level of a Dishwasher
Try It 10.52: Calculating the Decibel Level of City Traffic
Evaluating Common and Natural Logarithms with a Calculator
You are configuring a software dashboard to track your company's revenue growth, and the developer documentation states that the system scales data using the equation . To accurately interpret the model, you need to recall the standard mathematical convention for this notation. Which of the following statements correctly describes this function and its exponential equivalent?
You are working as a laboratory assistant at a water treatment facility. Your equipment manual uses specific shorthand for logarithmic data used in quality control reports. To ensure you are interpreting the data accurately, match each common logarithmic term or notation with its correct mathematical description or equivalent.
You are working as a laboratory technician and need to enter a formula from your equipment manual, , into a computer program. To ensure the program calculates the values correctly, you must recall that when a logarithm is written without an explicit base, the base is mathematically assumed to be ____.
Input Validation for Common Logarithmic Data
You are reviewing a technical manual for a data visualization tool that uses common logarithms to scale chart axes. True or False: According to standard mathematical convention, the notation is mathematically equivalent to the exponential equation .