(a) Let S={0,1,1/2,1/3,1/4, . . . ,1/n, . . .}. Prove that S isclosed in the euclidean topology on R.
(b) What if we remove the 0 in S? Is the set T={1,1/2,1/3,1/4, .. . ,1/n, . . .}also closed in R? Justify your answer.
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