1 1 Let Hn = 1+ 2 1 +... + be the n-th Harmonic number. Prove that H2n <1+n for all nonnegative integers n.

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A: given graph is

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A: We first expand log n to see the behavior. 

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A: This is a question of Logic.

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Q: 2. If A\B C B, which of the following may be true? а. АСВ b. A= Ø c. A OB = Ø

A: A\ B = { x : x ∈A and x ∉Ba and b may be true a. if A ⊆ B,  say A ={1,2,3},  and  B={ 1,2,3,4}A\B = ...

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