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1. $\frac{x}{a} - \frac{y}{b} = 1$

A. $a x + b y + a^{2} = 0$
B. $a x + b y + a^{2} = 0$
C. $a x + b y + a^{2} = 0$
D. $a x + b y + a^{2} = 0$

Answer: Option B

Explanation:

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