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Multiple choice

If the roots of the equation $x^{3}-3px^{2}+3qx-r=0$ are in H.P., then the mean root is

  1. $\displaystyle \frac{3r}{q}$
  2. $\displaystyle \frac{2r}{q}$
  3. $\displaystyle \frac{r}{q}$
  4. $-\displaystyle \frac{r}{q}$
Reveal answer Fill a bubble to check yourself
C Correct answer

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