1.

If the function f(x) & g(x) are defined on R to R such that f (x) = {{:( 0 , x in "rational") , (x "," , x in "irrational"):} g(x) = {{:( 0 "," , x in "irrational" ) , ( x "," , x in "rational" ):} then (f-g) (x) is

Answer»

ONE-one and onto
one-one but nor onto
onto but not one- one
NEITHER one-one nor onto

Answer :A


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