/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 73 Use the properties of logarithms... [FREE SOLUTION] | 91Ó°ÊÓ

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Use the properties of logarithms to rewrite expression. Simplify the result if possible. Assume all variables represent positive real numbers. $$\log _{3} \frac{\sqrt{x} \cdot \sqrt[3]{y}}{w^{2} \sqrt{z}}$$

Short Answer

Expert verified
\[\frac{1}{2}\text{log}_3 x + \frac{1}{3}\text{log}_3 y - 2\text{log}_3 w - \frac{1}{2} \text{log}_3 z\]

Step by step solution

01

- Apply the logarithm quotient rule

Use the logarithm quotient rule \(\frac{\text{log}_b M}{N} = \text{log}_b M - \text{log}_b N\) to separate the expression inside the logarithm: \(\text{log}_3 \frac{\text{numerator}}{\text{denominator}} = \text{log}_3 \text{numerator} - \text{log}_3 \text{denominator}\)Here, the numerator is \( \sqrt{x} \cdot \sqrt[3]{y} \) and the denominator is \((w^2 \sqrt{z})\)\[ \text{log}_3 \frac{\text{numerator}}{\text{denominator}} = \text{log}_3 \left ( \sqrt{x} \cdot \sqrt[3]{y} \right ) - \text{log}_3 \left ( w^2 \sqrt{z} \right ) \]
02

- Apply the logarithm product rule

Use the logarithm product rule \( \text{log}_b(M \cdot N) = \text{log}_b M + \text{log}_b N \) to separate the inner components of both the numerator and the denominator: \(\text{log}_3 \left ( \sqrt{x} \cdot \sqrt[3]{y} \right ) = \text{log}_3 \sqrt{x} + \text{log}_3 \sqrt[3]{y}\) \( \text{log}_3 \left ( w^2 \sqrt{z} \right ) = \text{log}_3 w^2 + \text{log}_3 \sqrt{z} \)
03

- Apply the logarithm power rule

Use the logarithm power rule: \(\text{log}_b (M^p) = p \text{log}_b M \) to move exponents in front of the logarithm. Simplify each term: \[\text{log}_3 \sqrt{x} = \text{log}_3 (x^{1/2}) = \frac{1}{2} \text{log}_3 x \], \(\text{log}_3 \sqrt[3]{y} = \text{log}_3 (y^{1/3}) = \frac{1}{3} \text{log}_3 y\) and \(\text{log}_3 w^2 = 2 \text{log}_3 w, \text{log}_3 \sqrt{z} = \text{log}_3 (z^{1/2}) = \frac{1}{2} \text{log}_3 z \)
04

- Combine all results

Now combine all previous results to form the final expression: \[ \text{log}_3 \left ( \frac{\text{numerator}}{\text{denominator}} \right ) = \frac{1}{2} \text{log}_3 x + \frac{1}{3} \text{log}_3 y - 2 \text{log}_3 w - \frac{1}{2} \text{log}_3 z \]

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Logarithm Quotient Rule
The logarithm quotient rule is a fundamental property of logarithms. It helps us deal with the division of terms inside a logarithm. The rule states: \( \log_b \left( \frac{M}{N} \right) = \log_b M - \log_b N \). This means that the logarithm of a quotient is the difference of the logarithms. For our exercise, applying this rule helps separate the numerator from the denominator. We then look at each part individually. The numerator \( \sqrt{x} \cdot \sqrt[3]{y} \) and the denominator \( w^2 \sqrt{z} \) each become subjects of their own logarithms.
Logarithm Product Rule
Next, let's use the logarithm product rule. This rule simplifies expressions where terms are multiplied inside a logarithm. The rule is given by: \( \log_b(M \cdot N) = \log_b M + \log_b N \). Using this in our context allows us to break down the terms \( \sqrt{x} \cdot \sqrt[3]{y} \) and \( w^2 \sqrt{z} \) into separate logarithms. This simplifies our complex expression into simpler parts. For instance, \( \log_3(\sqrt{x} \cdot \sqrt[3]{y}) = \log_3 \sqrt{x} + \log_3 \sqrt[3]{y} \). Similarly, \( \log_3(w^2 \sqrt{z}) = \log_3 w^2 + \log_3 \sqrt{z} \). Now we have isolated the terms, making it easier to work with them.
Logarithm Power Rule
Finally, we use the logarithm power rule to further simplify. This rule states: \( \log_b(M^p) = p\log_b M \). It lets us move any exponent in front of the logarithm. Applying this to our terms, we see: \( \log_3 \sqrt{x} = \log_3(x^{1/2}) = \frac{1}{2} \log_3 x \), \( \log_3 \sqrt[3]{y} = \log_3(y^{1/3}) = \frac{1}{3}\log_3 y \), \( \log_3 w^2 = 2 \log_3 w \) and \( \log_3 \sqrt{z} = \log_3(z^{1/2}) = \frac{1}{2} \log_3 z \). Combining all results, we simplify our original expression to: \( \log_3 \left( \frac{\sqrt{x} \cdot \sqrt[3]{y}}{w^2 \sqrt{z}} \right) = \frac{1}{2} \log_3 x + \frac{1}{3}\log_3 y - 2 \log_3 w - \frac{1}{2} \log_3 z \). This demonstrates the power and utility of these logarithm properties when simplifying complex expressions.

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