/*! 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 25 Write the given quantity as one ... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

Write the given quantity as one logarithm. \(\frac{1}{2} \log x-\frac{1}{3} \log y\)

Short Answer

Expert verified
\( \log \left( \frac{x^{1/2}}{y^{1/3}} \right) \)

Step by step solution

01

Apply Logarithm Power Rule

The logarithm power rule states that \( a \log b = \log b^a \). Apply this to each term: \( \frac{1}{2} \log x = \log x^{1/2} \) and \( \frac{1}{3} \log y = \log y^{1/3} \).
02

Combine Using the Quotient Rule

The logarithm quotient rule states that \( \log a - \log b = \log \left( \frac{a}{b} \right) \). Using this, combine the expressions: \( \log x^{1/2} - \log y^{1/3} = \log \left( \frac{x^{1/2}}{y^{1/3}} \right) \).

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Key Concepts

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

Logarithm Power Rule
The logarithm power rule is an essential tool in simplifying expressions where logarithms have coefficients. This rule helps you transform expressions by moving the coefficient inside the logarithm as an exponent on its argument. Particularly, when you have an expression like \( a \log b \), the rule tells us that it's equal to \( \log b^a \). Using this rule can help make complex logarithmic expressions easier to understand and simplify.
In our exercise, we deal with expressions such as \( \frac{1}{2} \log x \) and \( \frac{1}{3} \log y \). Applying the power rule here:
  • \( \frac{1}{2} \log x \) becomes \( \log x^{1/2} \)
  • \( \frac{1}{3} \log y \) becomes \( \log y^{1/3} \)
Implementing this step effectively sets the stage for using additional rules. Perceiving the coefficient as part of an exponent can also help in visualizing an expression's growth or decay, providing deeper insight into its nature.
Logarithm Quotient Rule
After applying the logarithm power rule, the next step in simplifying logarithmic expressions is often the logarithm quotient rule. This rule is particularly useful when the expression involves subtraction of two logarithms. The quotient rule simplifies \( \log a - \log b \) to \( \log \left( \frac{a}{b} \right) \). By reducing subtraction to division within a single logarithm, you can consolidate the expression for easier manipulation.
In our example, once the power rule is applied, we have two logarithms that are subtracted:
  • \( \log x^{1/2} - \log y^{1/3} \)
Applying the quotient rule to this expression gives us:
  • \( \log \left( \frac{x^{1/2}}{y^{1/3}} \right) \)
This transformation into a single logarithmic expression not only simplifies the math but also can make it easier to integrate into broader algebraic or calculus problems. Understanding these transformations is key to mastering logarithms and their applications.
Mathematical Problem Solving
Problem-solving in mathematics often involves breaking down complex expressions into more manageable parts. Key to this process is knowing and applying rules like the logarithm power and quotient rules effectively. By doing so, you can reduce complicated equations to simpler forms that are easier to work with or interpret.
In the context of logarithms, take these generalized steps in problem-solving:
  • **Identify the expression's form**: Look for features such as coefficients and subtractions.
  • **Choose the appropriate rules**: Depending on the form, decide if the power rule, quotient rule, or another property should be applied first.
  • **Simplify each step**: Ensure each transformation increases clarity and reduces complexity.
For instance, in the given problem, identifying the need for the power rule first allows us to manipulate the logarithms before using the quotient rule to consolidate them. Such a process can uncover hidden patterns or solutions, aiding in both immediate calculations and more complex problem-solving strategies.

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