Math Problem Statement

For the following function defined that is one-to-one, write an equation for the inverse function in the form y = f^(-1)(x). Give the domain and range of f and f^(-1). If the function is not one-to-one, say so. f(x) = √(3 + x), x ≥ -3

Solution

The problem in your image asks to find the inverse of the given function f(x)=3+x,x3f(x) = \sqrt{3 + x}, \, x \geq -3.

Step-by-step solution:

  1. Find the inverse function:
    Start by letting y=f(x)=3+xy = f(x) = \sqrt{3 + x}, which can be rewritten as: y=3+xy = \sqrt{3 + x} To find the inverse, solve for xx in terms of yy: y2=3+xy^2 = 3 + x x=y23x = y^2 - 3 Now, swap xx and yy to express the inverse function f1(x)f^{-1}(x): f1(x)=x23f^{-1}(x) = x^2 - 3

  2. Domain and range:

    • For the original function f(x)=3+xf(x) = \sqrt{3 + x}, the domain is x3x \geq -3 since the expression inside the square root must be non-negative. The range is f(x)0f(x) \geq 0, meaning y0y \geq 0.
    • For the inverse function f1(x)=x23f^{-1}(x) = x^2 - 3, the domain is x0x \geq 0 because the range of the original function becomes the domain of the inverse. The range of the inverse function is y3y \geq -3, as f1(x)=x23f^{-1}(x) = x^2 - 3.

Answer:

Looking at the multiple-choice options, the correct choice is:

  • B. f1(x)=x23,x0f^{-1}(x) = x^2 - 3, \, x \geq 0.

Would you like a detailed explanation of the inverse function process, or do you have any other questions?

Related Questions:

  1. How do you check if a function is one-to-one?
  2. Can every function have an inverse?
  3. What is the difference between a one-to-one function and a many-to-one function?
  4. How can you graphically determine if a function has an inverse?
  5. Why does the domain of the original function become the range of the inverse function?

Tip:

Always remember that when finding the inverse, it's important to swap the domain and range of the original function for the inverse function.

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Math Problem Analysis

Mathematical Concepts

Inverse Functions
Domain and Range
One-to-One Functions

Formulas

f(x) = √(3 + x)
Inverse Function Formula: f^(-1)(x)

Theorems

One-to-One Functions Theorem
Inverse Function Theorem

Suitable Grade Level

Grades 10-12