Find the Domain for the Function: (2x+2)/(3x-1)

Question

Look at the following function:

2x+23x1 \frac{2x+2}{3x-1}

What is the domain of the function?

Video Solution

Solution Steps

00:00 Does the function have a domain? If so, what is it?
00:03 To find the domain, remember that division by 0 is not allowed
00:07 Therefore, let's find the solution that makes the denominator zero
00:10 Let's isolate X
00:19 And this is the solution to the question

Step-by-Step Solution

To find the domain of the function 2x+23x1 \frac{2x + 2}{3x - 1} , we must ensure that the function is defined for all values of x x except where the denominator is zero.

Follow these steps to determine the domain:

  • Step 1: Identify the denominator of the function. The denominator is 3x1 3x - 1 .
  • Step 2: Set the denominator equal to zero and solve for x x : 3x1=0 3x - 1 = 0
  • Step 3: Solve the equation 3x1=0 3x - 1 = 0 : 3x=1 3x = 1 x=13 x = \frac{1}{3}
  • Step 4: State the domain. Since the function is undefined at x=13 x = \frac{1}{3} , the domain consists of all real numbers except x=13 x = \frac{1}{3} .

The domain of the function 2x+23x1 \frac{2x + 2}{3x - 1} is therefore all real numbers x x such that x13 x \neq \frac{1}{3} .

Thus, the solution is: x13 x \ne \frac{1}{3} .

Answer

x13 x\ne\frac{1}{3}