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AP EAMCET202022 Sep 2020Evening ShiftMathematicsQuadratic EquationActual

If , , are the roots of the equation 3 x^3-9 x^2+5 x-7 , then what is the value of + + ?

Options

  1. A3
  2. B–3
  3. C9
  4. D–9

Correct answer

A. 3

Step-by-step solution

Given, , , are roots of 3 x^3-9 x^2+5 x-7=0 aligned + + & =- b a & = -(-9) 3 + + & =3 aligned [ array l a=3 b=-9 array ] Hence, option (1) is correct.

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