Which characteristic/s implies(y) that a set S of real numbers is closed? S has no accumulation points S is bounded S has an open cover that contains a finite subcover None of the above. The set S=[1,3) is not compact. Which open cover of S contains a finite subcover? O {[1, 3+1/n) | neN} O {(1-1/n, 3 + 1/n) | nEN } O {(1+1/n, 3 + 1/n) | nEN } None of the above

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A: Option (B) is correct.

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A: See solution below. Here we used definition of bounded and closed sets.

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Q: I want you to prove it. Thank you.

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