Math Problem Statement

whats the domain and range of f(x)=x2f\left(x\right)=\sqrt{x^2}

Solution

The function you provided is f(x)=x2f(x) = \sqrt{x^2}.

Let's simplify the function: f(x)=x2=xf(x) = \sqrt{x^2} = |x| Here, x|x| represents the absolute value of xx.

Domain:

The domain of f(x)=xf(x) = |x| is the set of all real numbers since you can take the absolute value of any real number. Therefore, the domain is: Domain=(,)\text{Domain} = (-\infty, \infty)

Range:

The range of f(x)=xf(x) = |x| consists of all non-negative real numbers because the absolute value of any real number is always greater than or equal to zero. Therefore, the range is: Range=[0,)\text{Range} = [0, \infty)

Final Answer:

  • Domain: (,)(-\infty, \infty)
  • Range: [0,)[0, \infty)

Would you like more details or further explanation on this topic?

Here are 5 related questions you can explore:

  1. What is the domain and range of f(x)=x+2f(x) = |x + 2|?
  2. How do you find the domain and range of a square root function?
  3. How does the domain change for f(x)=x24f(x) = \sqrt{x^2 - 4}?
  4. What is the domain and range of f(x)=x4f(x) = \sqrt{x^4}?
  5. How do transformations affect the range of a function?

Tip: When simplifying square roots of squares, always remember that x2=x\sqrt{x^2} = |x|, not just xx. This avoids missing solutions in functions involving absolute values.

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Math Problem Analysis

Mathematical Concepts

Functions
Absolute Value
Square Root

Formulas

f(x) = √(x²) = |x|

Theorems

Properties of Absolute Value
Domain and Range of Functions

Suitable Grade Level

Grades 9-12