Math Problem Statement

(\log _(3)12-\log _(9)4)/(\log _((1)/(3))6)

Solution

To solve this expression step by step:

log3(12)log9(4)log1/3(6)\frac{\log_3(12) - \log_9(4)}{\log_{1/3}(6)}

Step 1: Simplify the numerator using logarithmic properties

The numerator is: log3(12)log9(4)\log_3(12) - \log_9(4)

Step 1.1: Rewrite log9(4)\log_9(4) in terms of base 3

Since 9=329 = 3^2, we use the change of base property: log9(4)=log3(4)log3(9)=log3(4)2\log_9(4) = \frac{\log_3(4)}{\log_3(9)} = \frac{\log_3(4)}{2}

Now, substitute into the numerator: log3(12)log3(4)2\log_3(12) - \frac{\log_3(4)}{2}

Step 1.2: Combine terms under base 3

The first term, log3(12)\log_3(12), can be written as: log3(12)=log3(43)=log3(4)+log3(3)\log_3(12) = \log_3(4 \cdot 3) = \log_3(4) + \log_3(3)

Thus, the numerator becomes: log3(4)+log3(3)log3(4)2\log_3(4) + \log_3(3) - \frac{\log_3(4)}{2}

Combine like terms involving log3(4)\log_3(4): log3(4)log3(4)2=2log3(4)2log3(4)2=log3(4)2\log_3(4) - \frac{\log_3(4)}{2} = \frac{2\log_3(4)}{2} - \frac{\log_3(4)}{2} = \frac{\log_3(4)}{2}

So the numerator simplifies to: log3(4)2+log3(3)\frac{\log_3(4)}{2} + \log_3(3)

Step 2: Simplify the denominator

The denominator is: log1/3(6)\log_{1/3}(6)

Using the change of base formula: log1/3(6)=log3(6)log3(1/3)\log_{1/3}(6) = \frac{\log_3(6)}{\log_3(1/3)}

Recall that log3(1/3)=1\log_3(1/3) = -1, so: log1/3(6)=log3(6)1=log3(6)\log_{1/3}(6) = \frac{\log_3(6)}{-1} = -\log_3(6)

Step 3: Combine numerator and denominator

The expression becomes: log3(4)2+log3(3)log3(6)\frac{\frac{\log_3(4)}{2} + \log_3(3)}{-\log_3(6)}

Factor out the negative sign in the denominator: (log3(4)2+log3(3)log3(6))-\left(\frac{\frac{\log_3(4)}{2} + \log_3(3)}{\log_3(6)}\right)

Step 4: Simplify further

Use the property log3(6)=log3(23)=log3(2)+log3(3)\log_3(6) = \log_3(2 \cdot 3) = \log_3(2) + \log_3(3) in the denominator: log3(4)2+log3(3)log3(2)+log3(3)\frac{\frac{\log_3(4)}{2} + \log_3(3)}{\log_3(2) + \log_3(3)}

Final Answer:

log3(4)2+log3(3)log3(2)+log3(3)-\frac{\frac{\log_3(4)}{2} + \log_3(3)}{\log_3(2) + \log_3(3)}

Let me know if you would like numerical approximations or more clarifications.


Expanding questions:

  1. What is the significance of the change of base property in logarithms?
  2. How does the choice of base affect the calculation of logarithms?
  3. Why does log3(1/3)=1\log_3(1/3) = -1?
  4. How can log3(6)\log_3(6) be broken into simpler components?
  5. What are the implications of combining logarithms with different bases?

Tip:

Always simplify logarithmic expressions step by step, and watch

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Math Problem Analysis

Mathematical Concepts

Logarithms
Change of Base Formula
Logarithmic Properties

Formulas

Change of Base: log_b(a) = log_c(a) / log_c(b)
Logarithmic Subtraction: log_b(x) - log_b(y) = log_b(x/y)
Logarithmic Multiplication: log_b(x * y) = log_b(x) + log_b(y)

Theorems

Change of Base Theorem
Logarithmic Rules for Products, Quotients, and Exponents

Suitable Grade Level

Grades 11-12 or College Level