Answer to Question #19141 in Real Analysis for Matthew Lind

Question #19141
What are the points of continuity and the points of discontinuity of the following function? Justify your answer. f(x) = x if x is rational. f(x) = x^3 if x is irrational.
1
Expert's answer
2012-11-22T09:14:24-0500
This function has no points of continuity, because for each neighborhood of any point x0 there exist both rational and irrational points.

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