Math Problem Statement

Let A = [0, 3] ja B = [1, 2]. define (A ×A) (B ×B). Draw pictures

Solution

To solve the problem and visualize it, let's break down each part:

  1. Define AA and BB:

    • Set A={0,3}A = \{0, 3\} and B={1,2}B = \{1, 2\}.
  2. Construct the Cartesian Products A×AA \times A and B×BB \times B:

    • A×AA \times A is the set of all ordered pairs where each element comes from AA. A×A={(0,0),(0,3),(3,0),(3,3)}A \times A = \{(0, 0), (0, 3), (3, 0), (3, 3)\}
    • B×BB \times B is the set of all ordered pairs where each element comes from BB. B×B={(1,1),(1,2),(2,1),(2,2)}B \times B = \{(1, 1), (1, 2), (2, 1), (2, 2)\}
  3. Calculate the Difference (A×A)(B×B)(A \times A) \setminus (B \times B):

    • This difference means we take all elements in A×AA \times A that are not in B×BB \times B.
    • Since there are no common pairs between A×AA \times A and B×BB \times B, we find that: (A×A)(B×B)=A×A={(0,0),(0,3),(3,0),(3,3)}(A \times A) \setminus (B \times B) = A \times A = \{(0, 0), (0, 3), (3, 0), (3, 3)\}
  4. Draw Pictures:

    • For visualization, we can plot the pairs in A×AA \times A and B×BB \times B on a grid to represent each point.
    • The pairs in A×AA \times A will be plotted separately from those in B×BB \times B to show the distinction between the sets.

Let's create the visualization. I'll generate the plot for these points.Here is the visualization:

  • Blue points represent the pairs in A×A={(0,0),(0,3),(3,0),(3,3)}A \times A = \{(0, 0), (0, 3), (3, 0), (3, 3)\}.
  • Red points represent the pairs in B×B={(1,1),(1,2),(2,1),(2,2)}B \times B = \{(1, 1), (1, 2), (2, 1), (2, 2)\}.

Since there are no common points between A×AA \times A and B×BB \times B, the set difference (A×A)(B×B)(A \times A) \setminus (B \times B) is simply all the blue points in A×AA \times A.

Would you like further details on any part of this solution?

Here are some follow-up questions to consider:

  1. What is the significance of Cartesian products in set theory?
  2. How would the solution change if AA and BB had overlapping elements?
  3. What does the operation \setminus mean for sets in general?
  4. How would you calculate (A×B)(B×A)(A \times B) \setminus (B \times A)?
  5. Could we represent these Cartesian products in other dimensions?

Tip: When visualizing Cartesian products, try to distinguish sets with different colors for clarity.

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Math Problem Analysis

Mathematical Concepts

Set Theory
Cartesian Products
Set Difference

Formulas

A × A = {(a1, a2) | a1, a2 ∈ A}
B × B = {(b1, b2) | b1, b2 ∈ B}
(A × A) \ (B × B)

Theorems

Properties of Cartesian Products
Set Difference Properties

Suitable Grade Level

Grades 10-12