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Ch. R - Review of Basic Concepts
Lial - College Algebra 13th Edition
Lial13th EditionCollege AlgebraISBN: 9780136881063당신이 사용하는 게 아니라요?교과서 변경
1장, 문제 135

Perform the indicated operations and/or simplify each expression. Assume all variables represent positive real numbers. x5y3z2\(\sqrt{\frac{x^5y^3}{z^2}\)}

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1
Rewrite the expression using exponents instead of radicals. Recall that the square root of a variable is the same as raising it to the power of 1/2. So, rewrite \(\sqrt{x^{5} y^{3}}\) as \((x^{5} y^{3})^{\frac{1}{2}}\).
Apply the power of a product rule: \((ab)^m = a^m b^m\). This means \((x^{5} y^{3})^{\frac{1}{2}} = x^{5 \cdot \frac{1}{2}} y^{3 \cdot \frac{1}{2}}\).
Simplify the exponents by multiplying: \(x^{\frac{5}{2}} y^{\frac{3}{2}}\).
Rewrite the entire expression as \(\frac{x^{\frac{5}{2}} y^{\frac{3}{2}}}{z^{2}}\) since the denominator \(z^{2}\) remains unchanged.
Check if any further simplification is possible by expressing fractional exponents as radicals or by factoring exponents, depending on the context or instructions.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Properties of Exponents

Understanding how to manipulate exponents is essential for simplifying expressions. This includes rules like multiplying powers with the same base, dividing powers, and raising powers to powers. For example, x^a / x^b = x^(a-b) and (x^a)^b = x^(ab).
추천 영상:
04:06
Rational Exponents

Simplifying Radicals

Simplifying radicals involves expressing the radicand as a product of perfect squares (or higher powers) and other factors to simplify the root. For example, √(x⁵) can be rewritten as x²√x by separating powers into even and odd exponents.
추천 영상:
5:48
Adding & Subtracting Unlike Radicals by Simplifying

Division of Expressions with Variables

When dividing expressions with variables, apply exponent rules to subtract exponents of like bases in numerator and denominator. Also, keep track of variables under radicals and outside to simplify the entire expression correctly.
추천 영상:
06:44
Radical Expressions with Variables