1. If $a \cdot b \neq 1$, and $3 a^{3}+123456789 a+2=0$, $2 b^{2}+123456789 b+3=0$, then $\frac{a}{b}=$ $\qquad$ .
二、1. $\frac{a}{b}=\frac{2}{3}$.
Solution Clearly, $a$ and $\frac{1}{b}$ are the two roots of the equation $3 x^{2}+123456789 x+2$ $=0$. By the relationship between roots and coefficients, we can get $a \cdot \frac{1}{b}=\frac{a}{b}=$ $\frac{2}{3}$.