ＧＷＤ数学一道有争议的题！ＧＷＤ－３０－４

katrinaxy520

$10,000 is deposited in a certain account that pays r percent annual interest compounded annually, the amount D(t), in dollars, that the deposit will grow to in t years is given by D(t) = 10,000 {1+(r/100)}^t.  What amount will the deposit grow to in 3 years?

(1)     D(t) = 11,000

(2)    r =10

                  

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.

我看以前的讨论说答案是Ｃ．我下载的ＴＴ３０套答案选Ｄ．

但我觉得是选Ｂ．

请ＮＮ解释一下！

nearmysea

我也觉得选B,期待大牛的出现。。。

achine

觉得 应该是D

因为根据条件A,

(1+r/100)^t=1.1,

其中t必须是整数, 而1.1除了可能是1.1的一次方,不可能是其他数的几次方.