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标题: 那位大侠能帮忙看看这道题咋做！谢啦谢啦！ [打印本页]

作者: sabineceng 时间: 2013-2-23 20:24 标题: 那位大侠能帮忙看看这道题咋做！谢啦谢啦！

In the sequence of nonzero numbers t1, t2, t3, …, tn, …, tn+1 = tn / 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: D

作者: zdytiffany 时间: 2013-2-24 18:58

T1=1. T5=1/16

作者: flyever98 时间: 2013-2-26 06:59

每一项都可以出来答案吧
1）可以用通用公式，T5=T3/4，T5=1/16
2）用相同的方法代换出T1=16T5，T5=1/16
D

作者: sabineceng 时间: 2013-2-26 18:57

谢谢！

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