QUESTION 2. [20 POINTS] Let G be a tree with at least n ≥ 2 vertices. Prove, by contradiction, that there are always at
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QUESTION 2. [20 POINTS] Let G be a tree with at least n ≥ 2 vertices. Prove, by contradiction, that there are always at
QUESTION 2. [20 POINTS] Let G be a tree with at least n ≥ 2 vertices. Prove, by contradiction, that there are always at least two vertices with exactly the same number of neighbors.