返回列表 发帖

求助另一道Prep!....

An investment of d dollars at k percent simple annual interest yields &600 interest over a 2-year period. In terms of d, what dollar amount invested at the same rate will yield $2,400 interest over a 3-year period?

答案是8d/3, 我心情激动算出4d/3.
怎么回事?!?!?

求助哪位高手指教!!!多谢!!!
收藏 分享

SI = P*N*R /100
where p-principal n- number of years r-rate
SI- SIMPLE INTEREST

GIVEN:

600 = d * 2 * k/100
kd = 600*50 (1)

Lets say x is the principal we need to find in terms of d

2400 = x * 3 *k/100
x = 2400 *100/3k
= 2400 * 100 * d / 3 * 600 *50 (from (1) k = 600*50/d)

8d/3

TOP

讲得非常透彻!!!雪中送碳!!!不胜感激!!!
天呐!!加洲高中数学教育出来的后果就是我这样!!后悔没在国内读!!!
赶紧把您讲的公式背好!!

TOP

返回列表

站长推荐 关闭


美国top10 MBA VIP申请服务

自2003年开始提供 MBA 申请服务以来,保持着90% 以上的成功率,其中Top10 MBA服务成功率更是高达95%


查看