Maths-
General
Easy

Question

In rule method the null set is represented by

  1. (a) left curly bracket blank right curly bracket  
  2. capital phi  
  3. left curly bracket x blank colon x not equal to x right curly bracket  
  4. left curly bracket x blank colon x equals x right curly bracket  

The correct answer is: left curly bracket x blank colon x not equal to x right curly bracket

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