AMC 8 1998 Problem 1

AMC8 1998 年第 1 题

比与比例★☆☆☆☆

For x=7 , which of the following is the smallest?

当 x=7 时，下列哪个最小？

A. $\dfrac{6}{x}$
B. $\dfrac{6}{x+1}$
C. $\dfrac{6}{x-1}$
D. $\dfrac{x}{6}$
E. $\dfrac{x+1}{6}$

正确答案 · Correct Answer

B

解析 · Solution

Solution 1

Plugging

x

in for every answer choice would give

\text{(A)}\ \dfrac{6}{7} \qquad \text{(B)}\ \dfrac{6}{8} \qquad \text{(C)}\ \dfrac{6}{6} \qquad \text{(D)}\ \dfrac{7}{6} \qquad \text{(E)}\ \dfrac{8}{6}

From here, we can see that the smallest is answer choice

B

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