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Question
Choose the correct alternative:
Let f : R → R be defined by `f(x) = {{:(x, x "is irrational"),(1 - x, x "is rational"):}` then f is
Options
Discontinuous at x = `1/2`
Continuous at x = `1/2`
Continuous everywhere
Discontinuous everywhere
Solution
Continuous at x = `1/2`
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