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ISI2015-DCG-26

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If $r$ be the ratio of the roots of the equation $ax^{2}+bx+c=0,$ then 

  1. $\frac{r}{b}=\frac{r+1}{ac}$
  2. $\frac{r+1}{b}=\frac{r}{ac}$
  3. $\frac{(r+1)^{2}}{r}=\frac{b^{2}}{ac}$
  4. $\left(\frac{r}{b}\right)^{2}=\frac{r+1}{ac}$
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