Math Problem Statement

Cevap

Determine the minimum point, maximum point, and bijective property of the function f(x) = x for the domain [-4, 2].

Solution

The given function is defined as f(x)=xf(x) = x for the domain [4,2][-4, 2]. Let’s address each question step by step:

1. Minimum Point

For the function f(x)=xf(x) = x, the output value is the same as the input value. Therefore:

  • The minimum point occurs at the smallest value of xx in the domain, which is x=4x = -4.
  • Thus, f(4)=4f(-4) = -4. Minimum point: (4,4)(-4, -4).

2. Maximum Point

Similarly:

  • The maximum point occurs at the largest value of xx in the domain, which is x=2x = 2.
  • Thus, f(2)=2f(2) = 2. Maximum point: (2,2)(2, 2).

3. Investigating Bijection (One-to-One and Onto)

The function f(x)=xf(x) = x is:

  • One-to-One: Each input xx produces a unique output f(x)f(x). This property holds because the function is linear with a slope of 1.
  • Onto: For every yy in the range [4,2][-4, 2], there exists an xx in the domain [4,2][-4, 2] such that f(x)=yf(x) = y. Thus, the function is onto.

Conclusion: f(x)=xf(x) = x is a bijective function in the domain [4,2][-4, 2].


Summary of Results:

  1. Minimum point: (4,4)(-4, -4).
  2. Maximum point: (2,2)(2, 2).
  3. The function f(x)=xf(x) = x is bijective in the given domain.

Do you want further clarifications or additional examples? Here are 5 related questions to expand on this:

  1. How do you determine the range of a function for a given domain?
  2. What are the conditions for a function to be bijective?
  3. Can a quadratic function have a bijective property on any interval?
  4. What would the minimum and maximum points be if the domain was extended to [5,3][-5, 3]?
  5. How do you analyze one-to-one properties for non-linear functions?

Tip: For linear functions like f(x)=xf(x) = x, the minimum and maximum points directly correspond to the endpoints of the domain.

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Math Problem Analysis

Mathematical Concepts

Linear Functions
Domain and Range
Bijection

Formulas

f(x) = x (identity function)

Theorems

One-to-One and Onto Functions

Suitable Grade Level

Grades 9-10