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2. Exercise 19 section 5.4. Suppose that a1, a2, a3, …. Is a sequence defined as...

2. Exercise 19 section 5.4. Suppose that a1, a2, a3, …. Is a sequence defined as follows:
a1=1 ak=2a⌊k/2⌋ for every integer k>=2.
Prove that an <= n for each integer n >=1.


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