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
2:11 minutes
Problem 92c
Textbook Question
Textbook Questionn Exercises 92–93, rewrite the equation in terms of base e. Express the answer in terms of a natural logarithm and then round to three decimal places. y = 73(2.6)^x
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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 y = a(b^x), where 'a' is a constant, 'b' is the base, and 'x' is the exponent. In this context, the function y = 73(2.6)^x represents an exponential growth model, where the output increases rapidly as 'x' increases. Understanding the properties of exponential functions is crucial for rewriting them in different bases.
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Natural Logarithm
The natural logarithm, denoted as ln(x), is the logarithm to the base 'e', where 'e' is approximately equal to 2.71828. It is the inverse operation of the exponential function with base 'e'. When rewriting an exponential equation in terms of base 'e', the natural logarithm is used to express the exponent in a more manageable form, facilitating easier calculations and interpretations.
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Change of Base Formula
The change of base formula allows us to convert logarithms from one base to another. It states that log_b(a) = log_k(a) / log_k(b) for any positive 'k'. This formula is particularly useful when rewriting an exponential equation in terms of base 'e', as it enables the transformation of logarithmic expressions, making it easier to solve for 'x' or express the equation in the desired format.
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