The roots of the equation $x^2-6x+7=0$ are $\alpha$ and $\beta$. The value of $\large\frac{1}{\alpha}+\frac{1}{\beta}$ is

Question

$\begin{array}{1 1} (a)\;\frac{7}{6}\\ (b)\;\frac{-7}{6} \\ (c)\;\frac{6}{7} \\(d)\;\frac{-6}{7} \end{array} $