r1 4 13 40 (a) Find the supremum of the set S :={3; §; 27 81 }, if the supremum exists. Justify your answer. {v2, v2 – v2, / 2 – /2 – v2, ….}, if the infimum V2, x2 = V2 – x1, x3 := /2 – x2, etc, then (b) Find the infimum of the set T := ... exists. Justify your answer. [Hint: Let x1 = solve by using limits.]

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