4. Show that if n is a positive integer, then Σ {a₁,...,ak}{1,2,...,n} (Here the sum is over all nonempty subsets of the set of the n smallest positive integers.) 1 a1a2 ak = n

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A: We have find the lcm of given numbers.

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Q: b) Suppose we randomly select a subset of integers from the set {18, 19, 20, 21, 22, 23, . ,717}.…

A: This is an interesting question but before the solution i want to tell about the subset of a set "…

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A: Kindly refer to Step 2 for the solution.

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A: The sum of the geometric series a, ar, ar2, ar3,…, arn-1 is given as the following formula.…

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A: Note: As per Bartleby's guidance, if more than one question asked, only one question has to be…

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A: Just substitute i equal to 1,2,3,... And you'll observe a pattern.

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A: Topic-series

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