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If f(x) = {{:(x,"x is rational"),(1-x,"x...

If `f(x) = {{:(x,"x is rational"),(1-x,"x is irrational"):}` then f(f(x)) is a)`x in R` b)`{{:(x,"x is irrational"),(1-x,"x is rational"):}`c)`{{:(x,"x is rational"),(1-x,"x is rational"):}` d)none of these

A

`xAA in in R`

B

`{{:(x,"x is irrational"),(1-x,"x is rational"):}`

C

`{{:(x,"x is rational"),(1-x,"x is rational"):}`

D

none of these

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The correct Answer is:
A
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