Maths-
General
Easy

Question

The abscissae of the points, where the tangent to curve gamma equals x to the power of 3 end exponent minus 3 x to the power of 2 end exponent minus 9 x plus 5 is parallel to x‐axis, are

  1. 0 and 0    
  2. x equals 1 and -1    
  3. x=1 and -3    
  4. x=-1 and 3    

The correct answer is: x=-1 and 3


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