Find the Domain of 12/√(4x-4): Square Root Function Analysis

Question

Look at the following function:

124x4 \frac{12}{\sqrt{4x-4}}

What is the domain of the function?

Video Solution

Solution Steps

00:00 Does the function have a domain? And if so, what is it?
00:03 Root must be for a positive number greater than 0
00:10 Let's isolate X
00:22 And this is the solution to the question

Step-by-Step Solution

To find the domain of the function 124x4 \frac{12}{\sqrt{4x-4}} , let's analyze the conditions necessary for the function to be defined.

The expression under the square root, 4x4 4x - 4 , must be positive, as the square root of a negative number is not defined in the real numbers, and division by zero is undefined. Therefore, we need:

  • 4x4>0 4x - 4 > 0

Solve this inequality step by step:

  • Add 4 to both sides: 4x4+4>0+4 4x - 4 + 4 > 0 + 4 , which simplifies to 4x>4 4x > 4 .
  • Divide both sides by 4: 4x4>44 \frac{4x}{4} > \frac{4}{4} , which simplifies to x>1 x > 1 .

The inequality x>1 x > 1 describes the domain of the function.

Therefore, the domain of the function 124x4 \frac{12}{\sqrt{4x-4}} is x>1 x > 1 .

Answer

x > 1