Solve the logarithmic equation.
Table of contents
- 0. Review of Algebra4h 18m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations1h 43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 5m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 22m
- 10. Combinatorics & Probability1h 45m
6. Exponential & Logarithmic Functions
Solving Exponential and Logarithmic Equations
Problem 5
Textbook Question
Solve each exponential equation in Exercises 1–22 by expressing each side as a power of the same base and then equating exponents. 22x-1=32
Verified step by step guidance1
Recognize that the equation is \$2^{2x-1} = 32$. The goal is to express both sides as powers of the same base.
Recall that 32 can be written as a power of 2 because \$32 = 2^5$.
Rewrite the equation using this expression: \$2^{2x-1} = 2^5$.
Since the bases are the same and the equation holds true, set the exponents equal to each other: \$2x - 1 = 5$.
Solve the resulting linear equation for \(x\) by isolating \(x\).
Verified video answer for a similar problem:This video solution was recommended by our tutors as helpful for the problem above
Video duration:
2mPlay a video:
Was this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Exponential Equations
An exponential equation is one in which variables appear as exponents. Solving such equations often involves rewriting both sides to have the same base, allowing the exponents to be set equal to each other. This method simplifies the problem to solving a linear equation in the exponent.
Recommended video:
Solving Exponential Equations Using Logs
Expressing Numbers as Powers of the Same Base
To solve exponential equations, it is crucial to rewrite each side as a power of the same base. For example, 32 can be expressed as 2^5 since 2 multiplied by itself 5 times equals 32. This step enables direct comparison of exponents.
Recommended video:
Higher Powers of i
Equating Exponents
Once both sides of an equation have the same base, the exponents can be set equal because if a^m = a^n, then m = n. This principle allows the conversion of an exponential equation into a simpler algebraic equation to solve for the variable.
Recommended video:
Guided course
Rational Exponents
Watch next
Master Solving Exponential Equations Using Like Bases with a bite sized video explanation from Patrick
Start learningRelated Videos
Related Practice
Multiple Choice
480
views
2
rank
