Math Problem Statement

log4 2=3x-8

Solution

To solve the equation log42=3x8\log_4 2 = 3x - 8, follow these steps:

Step 1: Evaluate the logarithm

The logarithm log42\log_4 2 asks, "To what power must 4 be raised to get 2?" This can be expressed as:

log42=12\log_4 2 = \frac{1}{2}

Step 2: Substitute the logarithm value into the equation

Now, substitute log42\log_4 2 with 12\frac{1}{2} in the equation:

12=3x8\frac{1}{2} = 3x - 8

Step 3: Solve for xx

Next, solve the equation for xx:

  1. Add 8 to both sides: 12+8=3x\frac{1}{2} + 8 = 3x

  2. Convert 8 to a fraction with a denominator of 2: 12+162=3x\frac{1}{2} + \frac{16}{2} = 3x

  3. Add the fractions: 172=3x\frac{17}{2} = 3x

  4. Divide both sides by 3 to solve for xx: x=176x = \frac{17}{6}

So, the solution is:

x=176x = \frac{17}{6}

Would you like more details on any step or have any questions?


Here are 5 related questions to consider:

  1. How would you solve the equation log48=2x5\log_4 8 = 2x - 5?
  2. Can you express logba\log_b a in terms of common logarithms (base 10)?
  3. How would you solve the equation log2(x+3)=4\log_2 (x+3) = 4?
  4. What is the value of xx in log10x=3\log_{10} x = 3?
  5. How do you change the base of a logarithm from base bb to base cc?

Tip: When dealing with logarithms, remember that logba\log_b a can be rewritten as logcalogcb\frac{\log_c a}{\log_c b} for any positive base cc. This is called the change of base formula.

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Math Problem Analysis

Mathematical Concepts

Logarithms
Equations

Formulas

Change of base formula

Theorems

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Suitable Grade Level

Grades 10-12