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Let f be a continuous function defined on a closed interval -1, 3. If f (x) is a rational number for all x in[-1, 3) , then show that f is a constant function on -1, 3.|

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beki

  1. There is a useful discussion at the URL below. google can provide more.

    math.stackexchange.com/questions/1347347/must-a-continuous-function-on-mathbb-r-with-only-rational-values-be-constant

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    oobleck

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