Question: 4. (6 points) For n 2 2, a complete graph on n vertices (nodes) is a simple graph that contains exactly one edge between each

4. (6 points) For n 2 2, a complete graph on

4. (6 points) For n 2 2, a complete graph on n vertices (nodes) is a simple graph that contains exactly one edge between each pair of distinct vertices. Prove by induction that the number of edges in a complete graph on n vertices is given by the formula

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