Suppose that a for all c [a, b] if and only if f(x) = 0 for
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for all c ˆˆ [a, b] if and only if f(x) = 0 for all x ˆˆ [a, b]. (Compare with Exercise 5.1.4, and notice that f need not be nonnegative here.)
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je f(x) dx =0
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By hypothesis d c fx dx d a fx dx c a fx dx 0 for all c d a b If fx 0 0 ...View the full answer
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