Math Problem Statement

For the function f(x) = ³√x + 4, find f⁻¹(x).

Solution

Let's solve the problem step by step. We are asked to find the inverse function f1(x)f^{-1}(x) for the given function f(x)=x3+4f(x) = \sqrt[3]{x} + 4.

Steps to Find the Inverse Function:

  1. Express the function: Start with the equation y=x3+4y = \sqrt[3]{x} + 4.

  2. Swap xx and yy: To find the inverse, we switch xx and yy: x=y3+4x = \sqrt[3]{y} + 4

  3. Solve for yy:

    • First, subtract 4 from both sides to isolate the cube root: x4=y3x - 4 = \sqrt[3]{y}
    • Then, cube both sides to get rid of the cube root: (x4)3=y(x - 4)^3 = y
    • So, the inverse function is: f1(x)=(x4)3f^{-1}(x) = (x - 4)^3

Answer:

The correct inverse function is f1(x)=(x4)3f^{-1}(x) = (x - 4)^3.

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

Here are five related questions to consider:

  1. How would you find the inverse of a quadratic function?
  2. What is the importance of finding the domain and range of inverse functions?
  3. Can a function always have an inverse? Why or why not?
  4. What is the graphical relationship between a function and its inverse?
  5. How do you verify that two functions are inverses of each other?

Tip: When finding the inverse of a function, remember that you essentially reverse the operations performed on the variable.

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Math Problem Analysis

Mathematical Concepts

Functions
Inverse Functions
Algebra

Formulas

f⁻¹(x) = (x - 4)³

Theorems

Inverse Function Theorem

Suitable Grade Level

Grades 9-11