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标题: GWD 31套 NO.4-Q16 答案对吗？ [打印本页]

作者: hedongshi 时间: 2006-9-28 06:29 标题: GWD 31套 NO.4-Q16 答案对吗？

GWD 31套 NO.4-Q16:

In the sequence of nonzero numbers t₁, t₂, t₃, …, t_n, …, t_n+1 = t_n / 2 for all positive integers n. What is the value of t₅?

(1) t₃ = 1/4

(2) t₁- t₅ = 15/16

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

Answer:

我认为是C，答案是D，请NN 指导，为什么选D，谢谢

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