If $\alpha$ and $\beta$ are the roots of the equation $ax^2+bx+c=0$,then the equation whose roots are $\alpha+\beta$ and $\frac{1}{\alpha}+\frac{1}{\beta}$ is

  • A
    $acx^2-(ab+bc)x+b^2=0$
  • B
    $acx^2+(ab+bc)x-b^2=0$
  • C
    $acx^2+(ab+bc)x+b^2=0$
  • D
    $acx^2-(ab+bc)x-b^2=0$

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