Math Problem Statement

Graphically represent the sets A, B, and C in the plane, and represent A ∩ B and the complement R^2 \ (B ∪ C) in the plane.

Solution

The image contains a mathematical problem with three sets AA, BB, and CC defined in R2\mathbb{R}^2 along with two tasks:

Problem: Given sets AA, BB, and CC are defined as follows:

  • A={(x,y)R2:y=x2+1}A = \{(x, y) \in \mathbb{R}^2 : y = x^2 + 1\}
  • B={(x,y)R2:x2,y+1>1}B = \{(x, y) \in \mathbb{R}^2 : |x| \leq 2, |y + 1| > 1\}
  • C={(x,y)R2:x>2}C = \{(x, y) \in \mathbb{R}^2 : |x| > 2\}

You are asked to: a) Graphically represent the sets AA, BB, and CC in the plane. b) Graphically represent the set ABA \cap B and the complement R2(BC)\mathbb{R}^2 \setminus (B \cup C) in the plane.


Step-by-step breakdown:

  1. Set AA:

    • This is the graph of the function y=x2+1y = x^2 + 1, which is a parabola opening upwards with vertex at (0,1)(0, 1).
  2. Set BB:

    • The condition x2|x| \leq 2 defines a vertical strip between x=2x = -2 and x=2x = 2.
    • The condition y+1>1|y + 1| > 1 can be rewritten as y>0y > 0 or y<2y < -2, excluding the horizontal band 2<y0-2 < y \leq 0.
  3. Set CC:

    • This is the region where x>2|x| > 2, meaning the area outside the vertical strip 2<x<2-2 < x < 2.

To represent the sets visually:

  • AA is a parabola.
  • BB is the region between x=2x = -2 and x=2x = 2, excluding 2<y0-2 < y \leq 0.
  • CC is the region outside the strip 2<x<2-2 < x < 2.

For part (b), you'll need to:

  • Find the intersection ABA \cap B, which is the region where both the parabola and the constraints of BB hold.
  • Represent R2(BC)\mathbb{R}^2 \setminus (B \cup C), the complement of the union of BB and CC, which will be the remaining area.

Would you like a graphical solution or further details on the steps? Here are some related questions:

  1. How do you calculate intersections of curves and regions graphically?
  2. How would you solve similar problems in three dimensions?
  3. How does the complement of a union work mathematically?
  4. What is the geometric interpretation of inequalities in two-dimensional space?
  5. Can you use computational tools to graph these sets?

Tip: For graphical representation, understanding the boundaries and constraints of each set is crucial in determining where they overlap or remain separate.

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Math Problem Analysis

Mathematical Concepts

Set Theory
Graphing in the Cartesian Plane
Intersections and Complements of Sets
Parabolas and Inequalities

Formulas

y = x^2 + 1 (Equation of a parabola)
|x| ≤ 2 (Inequality for B)
|y + 1| > 1 (Condition for B)
|x| > 2 (Condition for C)

Theorems

Properties of Parabolas
Set Intersection and Union
Graphing Inequalities in Two Dimensions

Suitable Grade Level

Undergraduate Mathematics or Advanced High School Mathematics