Math Problem Statement

Answer

Below is a directed graph on the set {1, 2, 3, 4}. Write the relation as a set of ordered pairs.

Solution

To answer this question, let's examine the directed graph provided and translate each arrow into an ordered pair. Each directed edge (ab)(a \rightarrow b) represents a relation (a,b)(a, b) between two elements.

Analysis of the Directed Graph

  1. Loop at node 1: This indicates the pair (1,1)(1, 1).
  2. Edge from 1 to 2: This gives the pair (1,2)(1, 2).
  3. Edge from 2 to 4: This results in the pair (2,4)(2, 4).
  4. Edge from 3 to 1: This results in the pair (3,1)(3, 1).
  5. Edge from 3 to 4: This gives the pair (3,4)(3, 4).
  6. Loop at node 4: This indicates the pair (4,4)(4, 4).

Constructing the Set of Ordered Pairs

The relation as a set of ordered pairs is: {(1,1),(1,2),(2,4),(3,1),(3,4),(4,4)}\{ (1, 1), (1, 2), (2, 4), (3, 1), (3, 4), (4, 4) \}

Matching the Answer Options

Looking at the provided options, the set that matches our findings is: {(1,1),(1,2),(2,4),(3,1),(3,4),(4,4)}\{ (1, 1), (1, 2), (2, 4), (3, 1), (3, 4), (4, 4) \} This corresponds to the third option in the list.

Final Answer

The correct answer is: Option 3: {(1,1),(1,2),(2,4),(3,1),(3,4),(4,4)}\{ (1, 1), (1, 2), (2, 4), (3, 1), (3, 4), (4, 4) \}

Would you like more details or have any questions?

Related Questions to Expand Understanding

  1. How would the answer change if additional loops were added to nodes 2 or 3?
  2. What properties does this relation have (e.g., reflexive, symmetric, transitive)?
  3. How would you describe a directed graph that represents a symmetric relation?
  4. What is the significance of loops in directed graphs in terms of relations?
  5. How would you represent this relation as a matrix?

Tip

In directed graphs, loops represent elements that relate to themselves, which is essential for understanding reflexive properties in relations.