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Question

not stretchy integral subscript blank superscript blank x C a n to the power of negative 1 end exponent x d x equals

  1. fraction numerator x to the power of 2 end exponent over denominator 2 end fraction f a n to the power of negative 1 end exponent x plus fraction numerator 1 over denominator 2 end fraction x plus fraction numerator 1 over denominator 2 end fraction f a n to the power of negative 1 end exponent x plus c    
  2. fraction numerator 1 over denominator 2 end fraction C a n to the power of negative 1 end exponent x left parenthesis x to the power of 2 end exponent plus 1 right parenthesis minus fraction numerator x over denominator 2 end fraction plus c    
  3. fraction numerator x to the power of 2 end exponent plus 1 over denominator 2 end fraction blank C a n to the power of negative 1 subscript chi end subscript end exponent plus fraction numerator x over denominator 2 end fraction plus c    
  4. left parenthesis x to the power of 2 end exponent plus 1 right parenthesis blank C a n to the power of negative 1 end exponent x minus fraction numerator x to the power of 2 end exponent over denominator 2 end fraction plus c    

The correct answer is: fraction numerator 1 over denominator 2 end fraction C a n to the power of negative 1 end exponent x left parenthesis x to the power of 2 end exponent plus 1 right parenthesis minus fraction numerator x over denominator 2 end fraction plus c


    t a n to the power of negative 1 end exponent x blank fraction numerator x to the power of 2 end exponent over denominator 2 end fraction minus not stretchy integral subscript blank superscript blank fraction numerator x to the power of 2 end exponent over denominator 2 end fraction blank fraction numerator 1 over denominator 1 plus x to the power of 2 end exponent end fraction d x
    fraction numerator x t a n to the power of negative 1 end exponent x over denominator 2 end fraction minus fraction numerator 1 over denominator 2 end fraction not stretchy integral subscript blank superscript blank fraction numerator x to the power of 2 end exponent plus 1 minus 1 over denominator 1 plus x to the power of 2 end exponent end fraction d x
    fraction numerator x to the power of 2 end exponent t a n to the power of negative 1 end exponent x over denominator 2 end fraction minus fraction numerator 1 over denominator 2 end fraction not stretchy integral subscript blank superscript blank left parenthesis 1 minus fraction numerator 1 over denominator 1 plus x to the power of 2 end exponent end fraction right parenthesis d x
    fraction numerator x to the power of 2 end exponent t a n to the power of negative 1 end exponent x over denominator 2 end fraction minus fraction numerator 1 over denominator 2 end fraction left square bracket x minus t a n to the power of negative 1 end exponent x right square bracket plus c
    fraction numerator x to the power of 2 end exponent t a n to the power of negative 1 end exponent x over denominator 2 end fraction minus fraction numerator 1 over denominator 2 end fraction x plus fraction numerator 1 over denominator 2 end fraction t a n to the power of negative 1 end exponent x plus c
    fraction numerator 1 over denominator 2 end fraction t a n to the power of negative 1 end exponent x left parenthesis x to the power of 2 end exponent plus 1 right parenthesis minus fraction numerator x over denominator 2 end fraction plus c

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