Question: 2. Let a, bER, a 2. Let a, b e IR, a < b . L e t n e Z+. Suppose that fis bounded

2. Let a, bER, a

2. Let a, b e IR, a < b . L e t n e Z+. Suppose that fis bounded on [a, b]. Let P = {:ri} be any partition of [a, b]. Prove that the Darboux upper sum U(f, P ) is greater than or equal to the Darboux lower sum L(f, P ).

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