Math Problem Statement
List the ordered pairs in the relation π from π΄ = {0,1,2,3,4} to π΅ = {0,1,2,3}, where (π, π) β π if and only if (a) π = π (b) π + π = 4 (c) π > π (d) π|π (e) gcd(π, π) = 1 (f) lcm(π, π) = 2
Solution
Let's analyze the conditions one by one for the relation from set to set .
(a)
The ordered pairs where are simply those where the elements of and are equal:
(b)
The ordered pairs where the sum of and equals 4: However, note that must be in , so exclude pairs with . Thus, the relation is:
(c)
The ordered pairs where is greater than :
(d)
The ordered pairs where divides (meaning is a multiple of ): Note that divides but is typically not considered a divisor for non-zero numbers.
(e)
The ordered pairs where the greatest common divisor (gcd) of and is 1: For where , the gcd is , so these are not included.
(f)
The ordered pairs where the least common multiple (lcm) of and is 2: Here and are the only pairs that give an lcm of 2.
Would you like details or have any questions?
Related Questions:
- How is the gcd of two numbers calculated?
- What is the significance of lcm in number theory?
- Can you explain the division algorithm used in condition (d)?
- What are some real-world applications of relations in set theory?
- How can we generalize these conditions for larger sets?
Tip: When working with relations, ensure you clearly understand the definitions of operations like gcd, lcm, and divisibility, as they often appear in various mathematical contexts.
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Math Problem Analysis
Mathematical Concepts
Set Theory
Relations
Formulas
gcd(a, b)
lcm(a, b)
Theorems
-
Suitable Grade Level
High School
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