一个数学小问（关于年利率的）~~等待解答~~

yuletide9 · 发表于 2008-12-29 20:53:00

关于年利率的问题：

Mr. D deposits 10000 in a savings certificate earning P percent annual interest compounded quarterly. What is the value of P?

(1) During the term of the certificate, he earns 18 more than he would if the interest were not compounded.

(2) He withdraws all the money six months after depositing it.

不记得公式还有用法了~~

shiftmonkey · 发表于 2008-12-29 22:33:00

是不是10,000*(1+p%/4)^4?

yuletide9 · 发表于 2008-12-29 23:13:00

答案是C来的

yuletide9 · 发表于 2008-12-29 23:14:00

如果是"10,000*(1+p%/4)^4?"的话,应该是A或者D~

rosyrosy00 · 发表于 2008-12-30 00:34:00

是C啊，条件一不知道存了多久，条件二不知道赚了多少。

一个数学小问（关于年利率的）等待解答