Math Problem Statement

Solve the equation by using properties of the logarithm function. Enter the value of x rounded to four decimal places. 4×log(7^x)=52

Solution

To solve the equation 4×log(7x)=524 \times \log(7^x) = 52 using the properties of logarithms, follow these steps:

Step 1: Apply the logarithm power rule

The logarithm power rule states that log(ab)=b×log(a)\log(a^b) = b \times \log(a). So, we can rewrite the equation as: 4×x×log(7)=524 \times x \times \log(7) = 52

Step 2: Isolate the logarithmic term

Next, divide both sides of the equation by 4 to isolate the x×log(7)x \times \log(7) term: x×log(7)=524x \times \log(7) = \frac{52}{4} x×log(7)=13x \times \log(7) = 13

Step 3: Solve for xx

Now, divide both sides of the equation by log(7)\log(7) to solve for xx: x=13log(7)x = \frac{13}{\log(7)}

Step 4: Calculate the value of xx

Now, compute the value of xx using a calculator: x=13log(7)130.845115.3791x = \frac{13}{\log(7)} \approx \frac{13}{0.8451} \approx 15.3791

So, the value of xx rounded to four decimal places is 15.3791\boxed{15.3791}.

Would you like more details, or do you have any questions about this process?

Here are five questions that relate to the problem:

  1. How does the power rule of logarithms apply to logarithmic equations?
  2. What is the significance of the base of the logarithm in solving equations?
  3. How would the solution change if the base of the logarithm was different?
  4. Can you derive the logarithm power rule starting from the basic definition of logarithms?
  5. How can logarithmic equations be solved if they involve multiple logarithms with different bases?

Tip: When solving logarithmic equations, always check if you can simplify the equation by applying logarithm rules such as the product, quotient, and power rules. This often makes the equation easier to solve.

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Math Problem Analysis

Mathematical Concepts

Logarithms
Properties of Logarithms
Algebra

Formulas

log(a^b) = b * log(a)
x = 13 / log(7)

Theorems

Logarithm Power Rule

Suitable Grade Level

Grades 10-12