If s/t=2，then the Value of which of the following can be determined?[img]2022m1

游客2024-01-13 53

问题 If s/t=2，then the Value of which of the following can be determined?

选项 A、Ⅰ only
B、Ⅲ only
C、Ⅰ and Ⅱ only
D、Ⅱ and Ⅲ only
E、Ⅰ，Ⅱ，and Ⅲ

答案 C

解析 Substitute 2t for s in the expressions given in I, II, and III.
√ I. Value can be determined: 2t/s = 2t/2t = 1
√ II. Value can be determined:

× Ⅲ. Value cannot be determined:

equals 0 if t = 1, and equals 1/3 if t = 2
The correct answer is C.

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