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text If  end text 3 x to the power of 2 end exponent minus 11 x y plus 10 y to the power of 2 end exponent minus 7 x plus 13 y plus k equals 0 denotes a pair of straight lines, then the point of intersection of the lines is

  1. (1, 3)    
  2. (3, 1)    
  3. (-3, 1)    
  4. (1, -3)    

The correct answer is: (3, 1)


    fraction numerator partial differential f over denominator partial differential x end fraction equals 0 comma fraction numerator partial differential f over denominator partial differential y end fraction equals 0

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