17) In a complete graph with 720 distinct Hamilton circuits, there is a total of B) 9 vertices. A) 6 vertices. C) 7 vertices. D) 5 vertices.

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Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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**Question:**

In a complete graph with 720 distinct Hamilton circuits, there is a total of

A) 6 vertices.  
B) 9 vertices.  
C) 7 vertices.  
D) 5 vertices.

**Explanation:**

A Hamilton circuit in a complete graph involves visiting every vertex exactly once and returning to the starting point. The number of Hamilton circuits in a complete graph with \( n \) vertices is given by the formula:

\[
\frac{(n-1)!}{2}
\]

Here, we know there are 720 distinct Hamilton circuits. Thus, we set up the equation:

\[
\frac{(n-1)!}{2} = 720
\]

Solving this would give us the number of vertices. Note that as a complete graph grows in the number of vertices, the number of possible Hamilton circuits grows factorially.
Transcribed Image Text:**Question:** In a complete graph with 720 distinct Hamilton circuits, there is a total of A) 6 vertices. B) 9 vertices. C) 7 vertices. D) 5 vertices. **Explanation:** A Hamilton circuit in a complete graph involves visiting every vertex exactly once and returning to the starting point. The number of Hamilton circuits in a complete graph with \( n \) vertices is given by the formula: \[ \frac{(n-1)!}{2} \] Here, we know there are 720 distinct Hamilton circuits. Thus, we set up the equation: \[ \frac{(n-1)!}{2} = 720 \] Solving this would give us the number of vertices. Note that as a complete graph grows in the number of vertices, the number of possible Hamilton circuits grows factorially.
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