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If the roots of the equation x^3+b x^2+c x-1=0 are real, positive, distinct and in geometric progression then

Options

  1. Ab (- ,-3)
  2. Bone of the roots is 1
  3. Cone of the roots is smaller than 1 and one of the roots is bigger than 1
  4. Db+c=0

Correct answer

D. b+c=0

Step-by-step solution

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