Math Problem Statement

Assume that x, y, and b are positive numbers. Use the properties of logarithms to write the expression log_b(xy) in terms of the logarithms of x and y.

Solution

The given expression is:

logb(xy)\log_b(xy)

We need to rewrite this expression in terms of the logarithms of xx and yy.

Using the Product Rule for Logarithms:

The product rule states: logb(mn)=logb(m)+logb(n)\log_b(mn) = \log_b(m) + \log_b(n)

Applying the Rule:

logb(xy)=logb(x)+logb(y)\log_b(xy) = \log_b(x) + \log_b(y)

Final Expression:

logb(xy)=logb(x)+logb(y)\log_b(xy) = \log_b(x) + \log_b(y)

Would you like a detailed explanation of why this rule works or examples to practice?


Here are 5 follow-up questions for deeper understanding:

  1. How would this rule change if it were logb(xy)\log_b\left(\frac{x}{y}\right) instead of logb(xy)\log_b(xy)?
  2. Can you extend this rule to three or more terms, such as logb(xyz)\log_b(xyz)?
  3. What is the significance of the base bb in logarithmic calculations?
  4. How can this property help simplify logarithmic equations in problem-solving?
  5. What happens if either xx or yy is equal to 1 in this expression?

Tip: Memorize key logarithmic properties like the product, quotient, and power rules—they simplify complex expressions dramatically

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Math Problem Analysis

Mathematical Concepts

Logarithms
Properties of Logarithms

Formulas

log_b(mn) = log_b(m) + log_b(n)

Theorems

Product Rule for Logarithms

Suitable Grade Level

Grades 9-11