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Let r1 and r2 be any two rational numbers, with r1 < r2. Complete parts (i) and (ii) below: (i) Show from the definition that

Let r1 and r2 be any two rational numbers, with r1 < r2. Complete parts

(i) and (ii) below: (i) Show from the definition that r given below is a rational number:

r = r1 + r2 2

(ii) Show that r satisfies the inequality r1 < r < r2

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