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The solution of the differential equation fraction numerator d y over denominator d x end fraction equals fraction numerator y over denominator x end fraction plus fraction numerator f comma left parenthesis fraction numerator y over denominator x end fraction right parenthesis over denominator empty set left parenthesis fraction numerator y over denominator x end fraction right parenthesis end fraction is

  1. f left parenthesis fraction numerator y over denominator x end fraction right parenthesis equals k x    
  2. x f left parenthesis fraction numerator y over denominator x end fraction right parenthesis equals k    
  3. f left parenthesis fraction numerator y over denominator x end fraction right parenthesis equals k y    
  4. y f left parenthesis fraction numerator y over denominator x end fraction right parenthesis equals k    

The correct answer is: f left parenthesis fraction numerator y over denominator x end fraction right parenthesis equals k x


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