2025年11月国际A卷 · 第 18 题

2025年11月国际A卷 · 原库模块 2 · Q18 原库参考解析

\( \frac{x}{5}+\frac{y}{9}=\frac{47}{45} \)
An engineer connects resistors in series, where the resistors in the series have a total resistance of \( \frac{47}{45} \) ohms. In this series, there are x resistors of type A, which each have a resistance of a ohms, and y resistors of type B, which each have a resistance of b ohms. The given equation represents this situation. According to this equation, what is the positive difference between the value of a and the value of b?

2025年11月国际A卷 · 第 18 题

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