Let (x) = 1 if x is rational and f (x) = 0 if x is irrational.

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Let ƒ(x) = 1 if x is rational and f (x) = 0 if x is irrational. Prove that lim lim f(x) XC does not exist for any c. There exist rational and irrational numbers arbitrarily close to any c.

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Calculus

ISBN: 9781319055844

4th Edition

Authors: Jon Rogawski, Colin Adams, Robert Franzosa

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