question_answer

Find\[{{\alpha }^{-1}}+{{\beta }^{-1}}\]if\[\alpha \]and\[\beta \]are the zeros of the polynomial\[\text{f(x)}=\text{9}{{\text{x}}^{\text{2}}}-\text{3x}-\text{2}\].

A)  \[\frac{-3}{2}\]                

B)         \[\frac{5}{3}\]

C)  \[\frac{-2}{7}\]                

D)         \[\frac{2}{7}\]