Solve each equation. x3/2 = 125
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
0. Review of Algebra
Rational Exponents
Problem 85
Textbook Question
Simplify each expression. Write answers without negative exponents. Assume all variables represent positive real numbers. 1003/2
Verified step by step guidance1
Recognize that the expression is a power of a number: \$100^{3/2}\(. This means you are raising 100 to the power of \)\frac{3}{2}$.
Recall the property of exponents that \(a^{m/n} = \left(a^{1/n}\right)^m = \left(\sqrt[n]{a}\right)^m\). Here, \(n=2\) and \(m=3\), so rewrite the expression as \(\left(\sqrt{100}\right)^3\).
Calculate the square root of 100, which is \(\sqrt{100} = 10\).
Now raise 10 to the power of 3, which is \$10^3$.
Express the final answer without negative exponents by writing \$10^3\( as \)10 \times 10 \times 10\( or simply keep it as \)10^3$.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Exponents and Rational Exponents
Exponents indicate how many times a base is multiplied by itself. Rational exponents, like 3/2, represent roots and powers simultaneously; for example, a^(3/2) means the square root of a cubed. Understanding how to interpret and manipulate these is essential for simplifying expressions.
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Simplifying Expressions with Exponents
Simplifying expressions involves applying exponent rules such as multiplying powers, raising powers to powers, and converting between radical and exponential forms. This helps rewrite expressions in simpler or more standard forms, especially when removing negative exponents.
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Writing Expressions Without Negative Exponents
Negative exponents indicate reciprocals, so expressions with negative exponents can be rewritten as fractions with positive exponents. Since the problem requires answers without negative exponents, converting all negative powers to positive ones is necessary for the final simplified form.
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