Math Problem Statement

Simplify the expression \( \log_8 2 + \log_8 3 + \log_8 (x^2 - 1) \) as a single logarithm.

Solution

To solve the given problem, we need to combine the expression

log82+log83+log8(x21)\log_8 2 + \log_8 3 + \log_8 (x^2 - 1)

into a single logarithm.

Solution Steps

  1. Apply the Product Rule for Logarithms: Recall that the sum of logarithms with the same base can be combined using the product rule: logba+logbc=logb(ac)\log_b a + \log_b c = \log_b (a \cdot c)

  2. Combine the Terms: Using the product rule, we can rewrite the expression as: log82+log83+log8(x21)=log8(23(x21))\log_8 2 + \log_8 3 + \log_8 (x^2 - 1) = \log_8 (2 \cdot 3 \cdot (x^2 - 1))

  3. Simplify the Product Inside the Logarithm: Multiply the terms inside the logarithm: log8(23(x21))=log8(6(x21))\log_8 (2 \cdot 3 \cdot (x^2 - 1)) = \log_8 (6(x^2 - 1))

  4. Final Answer: The expression simplifies to: log8(6(x21))\log_8 (6(x^2 - 1))

So, the answer is: log8(6(x21))\log_8 (6(x^2 - 1))

Would you like further clarification on this solution?


Here are five related questions to deepen your understanding:

  1. How would you simplify log54+log57\log_5 4 + \log_5 7 into a single logarithm?
  2. What is the result of log8(x21)\log_8 (x^2 - 1) if x=2x = 2?
  3. How would you approach a problem that includes subtraction of logs, such as log810log82\log_8 10 - \log_8 2?
  4. What is the change of base formula for logarithms, and how would it apply to base 8?
  5. Can this expression, log8(6(x21))\log_8 (6(x^2 - 1)), be further simplified if x21x^2 - 1 was a specific number?

Tip: When combining logarithmic expressions, always look for opportunities to apply the product, quotient, and power rules of logarithms to simplify expressions.

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Math Problem Analysis

Mathematical Concepts

Logarithms
Product Rule

Formulas

\log_b a + \log_b c = \log_b (a \cdot c)

Theorems

Product Rule of Logarithms

Suitable Grade Level

Grades 9-12