Math Problem Statement

Find the inverse of f(x) = 8/(2x - 3)

Solution

The problem shown in the image asks to find the inverse of the function f(x)=82x3f(x) = \frac{8}{2x - 3}.

Steps to find the inverse function:

  1. Start with the function y=82x3y = \frac{8}{2x - 3}.

  2. Swap yy and xx to find the inverse: x=82y3x = \frac{8}{2y - 3}

  3. Solve for yy:

    • Multiply both sides by 2y32y - 3 to get rid of the denominator: x(2y3)=8x(2y - 3) = 8

    • Distribute xx on the left-hand side: 2xy3x=82xy - 3x = 8

    • Add 3x3x to both sides to isolate the 2xy2xy term: 2xy=8+3x2xy = 8 + 3x

    • Divide both sides by 2x2x to solve for yy: y=8+3x2xy = \frac{8 + 3x}{2x}

    • This can be simplified to: y=82x+3x2x=4x+32y = \frac{8}{2x} + \frac{3x}{2x} = \frac{4}{x} + \frac{3}{2}

  4. Therefore, the inverse function f1(x)f^{-1}(x) is: f1(x)=4x+32f^{-1}(x) = \frac{4}{x} + \frac{3}{2}

Would you like further details on this solution, or do you have any questions? Here are some related questions that can help expand your understanding:

  1. What is the general process for finding the inverse of a function?
  2. How do you verify if the inverse function found is correct?
  3. How does the domain of the original function affect the inverse?
  4. What happens to the graph of a function when you find its inverse?
  5. What are some functions that do not have an inverse? Why?

Tip: Always remember that not all functions have inverses. A function must be one-to-one (pass the Horizontal Line Test) to have an inverse.

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Math Problem Analysis

Mathematical Concepts

Algebra
Inverse Functions

Formulas

y = 8/(2x - 3)
f^(-1)(x) = (4/x) + (3/2)

Theorems

Steps to find the inverse function by swapping variables and solving for y

Suitable Grade Level

Grades 10-12