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
Solving Exponential and Logarithmic Equations
1:40 minutes
Problem 21a
Textbook Question
Textbook QuestionSolve each exponential equation in Exercises 1–22 by expressing each side as a power of the same base and then equating exponents. e^(x+1)=1/e
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Exponential Functions
Exponential functions are mathematical expressions in the form f(x) = a * b^x, where 'a' is a constant, 'b' is the base (a positive real number), and 'x' is the exponent. These functions exhibit rapid growth or decay, depending on the base. Understanding their properties, such as the behavior of the function as 'x' approaches positive or negative infinity, is crucial for solving exponential equations.
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Equating Exponents
When two exponential expressions with the same base are equal, their exponents must also be equal. This principle allows us to simplify and solve equations by transforming them into a linear form. For example, if a^m = a^n, then m = n, provided 'a' is not zero or one. This concept is essential for solving the given equation by expressing both sides with a common base.
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Properties of Exponents
The properties of exponents, such as the product of powers, quotient of powers, and power of a power, provide rules for manipulating exponential expressions. For instance, a^m * a^n = a^(m+n) and a^m / a^n = a^(m-n). These properties are vital for rewriting expressions in the same base, which is necessary for solving exponential equations like the one presented.
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