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
2:06 minutes
Problem 93b
Textbook Question
Textbook QuestionIn Exercises 93–102, solve each equation. 5^2x ⋅ 5^4x=125
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Exponential Equations
Exponential equations involve variables in the exponent and can often be solved by applying properties of exponents. In this case, the equation 5^(2x) ⋅ 5^(4x) can be simplified using the property that states a^m ⋅ a^n = a^(m+n). This allows us to combine the exponents before solving for the variable.
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Properties of Exponents
The properties of exponents are rules that govern how to manipulate expressions involving powers. Key properties include the product of powers, which states that when multiplying like bases, you add the exponents, and the power of a power, which states that when raising a power to another power, you multiply the exponents. Understanding these properties is essential for simplifying and solving exponential equations.
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Logarithms
Logarithms are the inverse operations of exponentiation and are used to solve equations where the variable is an exponent. For example, if you have an equation in the form a^x = b, you can use logarithms to isolate x by rewriting it as x = log_a(b). In this problem, once the exponential equation is simplified, logarithms may be used to find the value of x if necessary.
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