标题: GWD-3 一道求助!!! [打印本页]
作者: hongyangyan 时间: 2009-12-16 07:23 标题: GWD-3 一道求助!!!
Q10: 第二个为什么可以呢?
If $1,000 will be deposited in a bank account and I is the dollar amount of interest earned from the original deposit, represented as I = 1000 {(1 + r/100)n – 1}, and the annual interest rate is r percent, is r > 8 percent?
(1) The deposit earns a total of $210 in interest in the first 2 years.
(2) (1 + r/100)2 > 1.15
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.
作者: yahooww 时间: 2009-12-16 20:44
哪个n和条件2里的2,应该都是上标吧?
作者: hongyangyan 时间: 2009-12-17 07:01
是的,,,我算的等于8%时也成立阿,,,这样(2)就不行了丫
作者: yahooww 时间: 2009-12-17 20:33
这个......我也没看明白条件2为什么可以.......
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