Math Problem Statement

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Part 1

The function

f left parenthesis x right parenthesis equals x cubed minus 6f(x)=x3−6

is​ one-to-one.

Find an equation for

f Superscript negative 1 Baseline left parenthesis x right parenthesisf−1(x)​,

the inverse function.

Solution

To find the inverse of the function f(x)=x36f(x) = x^3 - 6, we need to follow these steps:

Step 1: Replace f(x)f(x) with yy

Let y=f(x)y = f(x), so: y=x36y = x^3 - 6

Step 2: Swap xx and yy

To find the inverse, swap xx and yy: x=y36x = y^3 - 6

Step 3: Solve for yy

Now solve for yy in terms of xx:

x+6=y3x + 6 = y^3 y=x+63y = \sqrt[3]{x + 6}

Step 4: Write the inverse function

So the inverse function is: f1(x)=x+63f^{-1}(x) = \sqrt[3]{x + 6}

Final Answer:

f1(x)=x+63f^{-1}(x) = \sqrt[3]{x + 6}

Let me know if you would like further clarification on any steps, or details on how the function and its inverse relate!


Here are five related questions you might find interesting:

  1. How can you verify that f(x)=x36f(x) = x^3 - 6 is one-to-one?
  2. What is the domain and range of f(x)f(x) and f1(x)f^{-1}(x)?
  3. How do you check if two functions are inverses of each other?
  4. Can the inverse function f1(x)f^{-1}(x) have any restrictions in its domain?
  5. How would this process change for more complicated functions like f(x)=x36x+2f(x) = x^3 - 6x + 2?

Tip: When finding the inverse, remember that the graph of a function and its inverse are reflections of each other across the line y=xy = x.

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Math Problem Analysis

Mathematical Concepts

Functions
Inverse Functions
Cubic Functions

Formulas

f(x) = x^3 - 6
f^(-1)(x) = ∛(x + 6)

Theorems

One-to-One Function Theorem
Inverse Function Theorem

Suitable Grade Level

Grades 10-12