AMC8 1996

AMC8 1996 · Q5

AMC8 1996 · Q5. It mainly tests Linear inequalities, Absolute value.

The letters P, Q, R, S, and T represent numbers located on the number line as shown. Which of the following expressions represents a negative number?

字母 P、Q、R、S 和 T 表示数轴上所示的位置。以下哪个表达式表示一个负数？

(A) $P - Q$ $P - Q$

(B) $P \cdot Q$ $P \cdot Q$

(D) $\frac{R}{P \cdot Q}$ $\frac{R}{P \cdot Q}$

(E) $\frac{S + T}{R}$ $\frac{S + T}{R}$

Answer

Correct choice: (A)

正确答案：（A）

Solution

Since P is to the left of Q, $P - Q$ is negative. All other expressions are positive.

由于 P 在 Q 的左侧，$P - Q$ 是负数。所有其他表达式都是正数。

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