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General
Easy

Question

If Z rightwards arrow Z is defined byf left parenthesis x right parenthesis equals open curly brackets table row cell fraction numerator x over denominator 2 end fraction text  if  end text x text  is even  end text end cell row cell 0 text  if  end text x text  odd  end text end cell end table close then f is

  1. onto but not one to one    
  2. one to one but not onto    
  3. one to one and onto    
  4. neither one to one nor onto    

The correct answer is: onto but not one to one



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