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1I f left parenthesis x right parenthesis equals left curly bracket fraction numerator 1 minus blank c o s blank x over denominator chi k end fraction r subscript X equals 0 end subscript x not equal to 0 is continuous at x=0, tthen k=

  1. 0    
  2. fraction numerator 1 over denominator 2 end fraction    
  3. fraction numerator 1 over denominator 4 end fraction    
  4. fraction numerator 1 over denominator 2 end fraction    

The correct answer is: 0


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