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If f(x) is defined on [0, 1) by f(x) = {...

If f(x) is defined on [0, 1) by `f(x) = { (x, "if x is rational ), (1 - x, if x is irrational):}` then for all `x in [0,1], f(f(x)) is

A

real

B

1 + x

C

x

D

None of these

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The correct Answer is:
A, C
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PATHFINDER-FUNCTION-QUESTION BANK
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