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The minimum value of the function f space left parenthesis x right parenthesis equals 3 t a n invisible function application x plus 4 c o t invisible function application x where x element of open parentheses 0 comma fraction numerator pi over denominator 2 end fraction close parentheses is

  1. 7    
  2. 2 square root of 12    
  3. 6 square root of 2    
  4. 12    

The correct answer is: 2 square root of 12

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