Table of contents
- 0. Review of Algebra4h 16m
- 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 19m
- 10. Combinatorics & Probability1h 45m
6. Exponential & Logarithmic Functions
Introduction to Logarithms
2:04 minutes
Problem 31b
Textbook Question
Textbook QuestionSolve each equation. log↓4 x = 3
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Logarithms
A logarithm is the inverse operation to exponentiation, representing the power to which a base must be raised to obtain a given number. In the equation log₄ x = 3, it indicates that 4 raised to the power of 3 equals x. Understanding logarithms is essential for solving equations involving them.
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Exponential Functions
Exponential functions are mathematical functions of the form f(x) = a^x, where 'a' is a positive constant. They are crucial for understanding how logarithms work, as they describe the relationship between the base and the exponent. In this case, knowing that 4^3 = 64 helps in solving the logarithmic equation.
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Change of Base Formula
The change of base formula allows the conversion of logarithms from one base to another, facilitating easier calculations. It states that logₐ b = logₓ b / logₓ a for any positive x. This concept can be useful if you need to evaluate logarithms with bases that are not easily computable.
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