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