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15. let a=(0 1) and the set of natural numbers. then the mapping f:N-A defined by f(2n-1)=0,f(2n)=1 for all n belongs to N is 1)one one function 2)many one onto 3)one one onto 4)many one into

Answer» 15. let a=(0 1) and the set of natural numbers. then the mapping f:N-A defined by f(2n-1)=0,f(2n)=1 for all n belongs to N is 1)one one function 2)many one onto 3)one one onto 4)many one into


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