Math Problem Statement

Simplify the logarithmic expression: log_a x^3 - log_a x

Solution

The expression provided is:

logax3logax\log_a x^3 - \log_a x

Simplification Steps:

We will use the logarithmic properties:

  1. Power Rule: logaxn=nlogax\log_a x^n = n \cdot \log_a x
  2. Difference Rule: logaxlogay=logaxy\log_a x - \log_a y = \log_a \frac{x}{y}

Step 1: Apply the power rule to logax3\log_a x^3

logax3=3logax\log_a x^3 = 3 \cdot \log_a x

Substitute this back into the expression: 3logaxlogax3 \cdot \log_a x - \log_a x

Step 2: Simplify the coefficients

(31)logax=2logax(3 - 1) \cdot \log_a x = 2 \cdot \log_a x

Final Answer:

logax3logax=2logax\log_a x^3 - \log_a x = 2 \cdot \log_a x


Would you like me to explain any step in more detail or solve a related problem?


Related Questions:

  1. How does the power rule for logarithms work in other cases, like loga(xn)\log_a (x^n)?
  2. Can you expand the subtraction rule for three terms, like logax4logax2logax\log_a x^4 - \log_a x^2 - \log_a x?
  3. What happens if a=10a = 10 (common logarithm) or a=ea = e (natural logarithm) in such expressions?
  4. Can this simplification be represented graphically? If yes, what does it look like?
  5. What are other real-world applications of logarithmic simplifications like this?

Tip:

Always simplify logarithmic expressions by applying the power, product, or quotient rules first to make calculations easier!

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Math Problem Analysis

Mathematical Concepts

Logarithms
Algebraic Simplification

Formulas

Power Rule: log_a x^n = n * log_a x
Difference Rule: log_a x - log_a y = log_a (x / y)

Theorems

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Suitable Grade Level

Grades 9-12