1.

If f(x)={:{(x",","x is rational"),(1-x",","x is irrational"):} then f(f(x)) is

Answer»

`X AA x in R`
`{:{(x",","x is IRRATIONAL"),(1-x",",x " is RATIONAL"):}`
`{:{(x",","x is rational"),(1-x"," ,"x is irrational"):}`
`{:(x",","x is rational"),(1+x"," ,x " is irrational"):}`

Answer :A


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