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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

If , and are the roots of the equation 9x^3 - 9x^2 - x + 1 = 0 ; , , [0, ] then the radius of the circle whose centre is ( , ) and passing through (2 ⁻¹( /4), 4) is:

Options

  1. A2
  2. B3
  3. C4
  4. D5.

Correct answer

B. 3

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