Math Problem Statement

Consider the following function.

f(x)=x−2‾‾‾‾‾√−4

Step 1 of 2:

Determine the more basic function that has been shifted, reflected, stretched, or compressed.

Solution

The function provided is:

f(x)=x24f(x) = \sqrt{x - 2} - 4

Step 1: Identify the Basic Function

The core of this function is the square root, x\sqrt{x}. The more basic function is:

g(x)=xg(x) = \sqrt{x}

Now, let's analyze the transformations applied to this basic function to get f(x)f(x).

Transformations:

  1. Horizontal Shift:

    • Inside the square root, we have x2x - 2. This represents a horizontal shift to the right by 2 units.
    • The transformation is g(x)=x2g(x) = \sqrt{x - 2}.
  2. Vertical Shift:

    • The constant 4-4 outside the square root represents a vertical shift downward by 4 units.
    • The transformation is f(x)=x24f(x) = \sqrt{x - 2} - 4.

Thus, the basic function g(x)=xg(x) = \sqrt{x} has been shifted to the right by 2 units and shifted downward by 4 units to obtain f(x)f(x).


Would you like more details on these transformations, or do you have any specific questions?

Here are 5 related questions to expand on this topic:

  1. What is the domain of the function f(x)f(x)?
  2. How would you reflect this function across the x-axis?
  3. What effect does multiplying the square root by a constant have?
  4. How would the graph change if the function was f(x)=x24f(x) = -\sqrt{x - 2} - 4?
  5. What would the function look like if the vertical shift was +4 instead of -4?

Tip: A horizontal shift is always the opposite of the sign inside the function. For example, x2x - 2 means shifting right by 2, not left!

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Math Problem Analysis

Mathematical Concepts

Functions
Square Root Functions
Function Transformations

Formulas

f(x) = sqrt(x)
Horizontal Shift: f(x) = sqrt(x - h)
Vertical Shift: f(x) = sqrt(x) + k

Theorems

Transformation of Functions
Horizontal and Vertical Shifts

Suitable Grade Level

Grades 9-11