Question: If f is a bounded function on [a, b] such that f(x) = 0 except for x in {c1, c2, . . . , cn}

If f is a bounded function on [a, b] such that f(x) = 0 except for x in {c1, c2, . . . , cn} in [a, b], show that U(f) = L(f) = 0.

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