Math Problem Statement

2∣x+2∣+1 Domain and Range

Solution

We are given the function f(x)=2x+2+1f(x) = 2|x+2| + 1. We need to determine the domain and range of this function.

Domain:

The domain refers to the set of all possible input values xx for which the function is defined.

  • The absolute value function x+2|x + 2| is defined for all real numbers.
  • Since there are no restrictions (like division by zero or square roots of negative numbers), f(x)f(x) is defined for all real values of xx.

Thus, the domain is: (,)\boxed{(-\infty, \infty)}

Range:

The range refers to the set of all possible output values of the function.

  • The absolute value function x+2|x+2| is always non-negative, meaning x+20|x+2| \geq 0.
  • Multiplying by 2, we have 2x+202|x+2| \geq 0.
  • Adding 1 to the expression gives 2x+2+112|x+2| + 1 \geq 1.

Thus, the minimum value of the function occurs when x=2x = -2, which gives f(x)=2(0)+1=1f(x) = 2(0) + 1 = 1. As xx moves away from 2-2, the value of f(x)f(x) increases without bound.

Therefore, the range is: [1,)\boxed{[1, \infty)}


Do you want more details or have any questions? Here are 5 related questions to explore further:

  1. What is the vertex of the function f(x)=2x+2+1f(x) = 2|x+2| + 1?
  2. How do we graph absolute value functions like f(x)f(x)?
  3. How does modifying the constant inside the absolute value affect the domain and range?
  4. Can the function f(x)=2x+2+1f(x) = 2|x+2| + 1 have a horizontal shift? If so, how?
  5. How does the multiplier (like 2 in this case) affect the slope of the graph of the function?

Tip: When determining the range of a function, consider how the function behaves for both small and large values of xx, especially for absolute value functions that reflect symmetry.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value Functions
Domain and Range

Formulas

f(x) = 2|x + 2| + 1

Theorems

Absolute Value Function Properties

Suitable Grade Level

Grades 9-12