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AP EAMCET202125 Aug 2021Evening ShiftMathematicsQuadratic EquationActual

If , and are the roots of the equation x^3+3 x^2-7 x+5=0 , then the value of 1 + 1 + 1 is

Options

  1. A-7 5
  2. B7 5
  3. C-3 5
  4. D3 5

Correct answer

B. 7 5

Step-by-step solution

Given, cubic equation, x^3+3 x^2-7 x+5=0 ...(i) Let , and are the roots of Eq. (i) array ll & + + = -3 1 =-3 & + + = -7 1 =-7 & = -5 1 =-5 & 1 + 1 + 1 = + + = -7 -5 = 7 5 array

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