Consider f(r) r+3r. Let P (0,,1..2) and P (0, 1,2) be two Partitions of (0, 2). Then 1. the difference between the two lower sums satisfies 0 s s(P) - s(P) < 70|| P||. 2. The upper sums satisfy S(P) 2 S(P) 3. S(P)= s(P) 4. non of the above. O 1 O 2 Оз O 4

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