Question: Let be continuous and never zero on [a, b]. Show that either (x) > 0 for all x in [a, b] or (x) <

Let ∫ be continuous and never zero on [a, b]. Show that either ∫(x) > 0 for all x in [a, b] or ∫(x) < 0 for all x in [a, b],

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