141- In the conic $x^2y^2 - 2ay + Ax + b = 0$, the point $(1, -1)$ is a vertex. What is the value of $\dfrac{a}{b}$? (4) $-\dfrac{1}{3}$ (3) $-\dfrac{1}{5}$ (2) $\dfrac{1}{5}$ (1) $\dfrac{1}{3}$
\textbf{141-} In the conic $x^2y^2 - 2ay + Ax + b = 0$, the point $(1, -1)$ is a vertex. What is the value of $\dfrac{a}{b}$?
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(4) $-\dfrac{1}{3}$ \hfill (3) $-\dfrac{1}{5}$ \hfill (2) $\dfrac{1}{5}$ \hfill (1) $\dfrac{1}{3}$
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