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Black Book Advanced Problems in MathematicsMathematicsApplication of Derivatives

The tangent at a point P on the curve y = ( 2 + 4 - x^2 2 - 4 - x^2 ) - 4 - x^2 meets the y -axis at T ; then PT^2 equals to :

Options

  1. A2
  2. B4
  3. C8
  4. D16

Correct answer

B. 4

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