Skip to main content
Ch. R - Review of Basic Concepts
Lial - College Algebra 13th Edition
Lial13th EditionCollege AlgebraISBN: 9780136881063Not the one you use?Change textbook
Chapter 1, Problem 8

Determine whether each statement is true or false. If false, correct the right side of the equation. (m2/3)(m1/3) = m2/9

Verified step by step guidance
1
Recall the property of exponents that states when multiplying expressions with the same base, you add the exponents: \(a^{x} \times a^{y} = a^{x+y}\).
Identify the base and exponents in the given expression: the base is \(m\), and the exponents are \(\frac{2}{3}\) and \(\frac{1}{3}\).
Add the exponents: \(\frac{2}{3} + \frac{1}{3} = \frac{2+1}{3} = \frac{3}{3}\).
Simplify the sum of the exponents: \(\frac{3}{3} = 1\).
Rewrite the product using the sum of exponents: \((m^{\frac{2}{3}})(m^{\frac{1}{3}}) = m^{1} = m\). Therefore, the original statement is false, and the correct right side of the equation is \(m\).

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
2m
Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Laws of Exponents

The laws of exponents govern how to simplify expressions involving powers of the same base. Specifically, when multiplying like bases, you add the exponents: a^m * a^n = a^(m+n). This rule is essential for correctly combining terms like m^(2/3) and m^(1/3).
Recommended video:
Guided course
04:06
Rational Exponents

Fractional Exponents

Fractional exponents represent roots and powers simultaneously. For example, m^(1/3) means the cube root of m, and m^(2/3) means the square of the cube root of m. Understanding how to add fractional exponents requires knowledge of adding fractions with common denominators.
Recommended video:
Guided course
04:06
Rational Exponents

Simplifying Exponent Expressions

Simplifying exponent expressions involves correctly performing arithmetic on the exponents after applying the laws of exponents. In this problem, adding 2/3 and 1/3 yields 3/3 or 1, so the product simplifies to m^1 = m, not m^(2/9). Recognizing and correcting such errors is key.
Recommended video:
Guided course
6:39
Simplifying Exponential Expressions