Math Problem Statement

solve for x, ln(x)- ln(x+2) =1

Solution

To solve the equation ln(x)ln(x+2)=1\ln(x) - \ln(x+2) = 1, follow these steps:

Step 1: Use the logarithm subtraction property

The property of logarithms that states ln(a)ln(b)=ln(ab)\ln(a) - \ln(b) = \ln\left(\frac{a}{b}\right) can be applied here: ln(x)ln(x+2)=ln(xx+2)\ln(x) - \ln(x+2) = \ln\left(\frac{x}{x+2}\right) So, the equation becomes: ln(xx+2)=1\ln\left(\frac{x}{x+2}\right) = 1

Step 2: Exponentiate both sides

To eliminate the natural logarithm, exponentiate both sides with base ee (the natural logarithm base): xx+2=e1\frac{x}{x+2} = e^1 xx+2=e\frac{x}{x+2} = e

Step 3: Solve the equation for xx

Multiply both sides by x+2x + 2 to get rid of the fraction: x=e(x+2)x = e(x + 2) Expand the equation: x=ex+2ex = ex + 2e Subtract exex from both sides: xex=2ex - ex = 2e Factor out xx on the left side: x(1e)=2ex(1 - e) = 2e Finally, solve for xx: x=2e1ex = \frac{2e}{1 - e}

Step 4: Simplify (optional)

Since the solution involves ee, you can leave it as: x=2e1ex = \frac{2e}{1 - e}

Answer:

The solution is x=2e1ex = \frac{2e}{1 - e}.

Would you like more details on this solution or have any other questions?


Here are 5 related questions you might find interesting:

  1. How do you solve an equation involving logarithms with different bases?
  2. What are the properties of logarithms, and how are they used in equations?
  3. How does the change of base formula work in logarithms?
  4. What is the relationship between logarithms and exponential functions?
  5. How can you solve a logarithmic equation when the variable is inside the logarithm?

Tip: When working with logarithmic equations, always check that the argument of the logarithm remains positive, as logarithms of non-positive numbers are undefined in the real number system.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Logarithms
Exponential Equations

Formulas

Logarithm subtraction property
Exponential equation solving

Theorems

-

Suitable Grade Level

Advanced High School