XA and x & f(x)}. Show Cim ƒ.) 38. Let a, b, c, and d be any real numbers such that a < b and c < d. Prove that [a, b] is equivalent to [c, d]. (Hint: Show that [a, b] is equivalent to [0, 1] first.) 0.5 REAL NUMBERS *39. If x < y, prove that x<* + y 2

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A: Option (C) II only is correct.

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A: A set is said to be empty if it does not contain any element.

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