Math Problem Statement

Opgave 2 Løs ligningen ln (x − 2) = 0

Solution

To solve the equation ln(x2)=0\ln(x - 2) = 0, we can follow these steps:

Step 1: Understand the logarithmic equation

The equation given is ln(x2)=0\ln(x - 2) = 0. This means that the natural logarithm (logarithm base ee) of x2x - 2 equals 0.

Step 2: Solve for x2x - 2

Recall that ln(y)=0\ln(y) = 0 implies y=1y = 1. This is because ln(1)=0\ln(1) = 0.

So, we set x2=1x - 2 = 1.

Step 3: Solve for xx

Now, add 2 to both sides of the equation:

x2=1x - 2 = 1

x=1+2x = 1 + 2

x=3x = 3

Final Answer:

The solution to the equation ln(x2)=0\ln(x - 2) = 0 is x=3x = 3.


Would you like more details or have any questions? Here are some related questions:

  1. What are the properties of the natural logarithm function?
  2. How do you solve logarithmic equations in general?
  3. What happens if the logarithm is defined with a different base?
  4. How do you solve equations involving multiple logarithmic terms?
  5. What is the domain of the function ln(x2)\ln(x - 2)?

Tip: Always check the domain of the logarithmic function to ensure that the argument is positive before solving the equation.

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Math Problem Analysis

Mathematical Concepts

Logarithms
Equations

Formulas

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Theorems

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Suitable Grade Level

Grades 10-12