高校问答周恩来的事迹50字:我是一个留学生！有一道题想请教英语好的并且理科好的同学！
来源：百度文库 编辑：高校问答 时间：2024/04/24 21:48:45
24.A merchant buys $3000 worth of goods from a supplier. She pays a certain amount down and agrees to pay $1000 in 6 months, and another $1000 after a further 6 months. The supplier charges 9.5% interest compounded semi-annually. Determine the down payment.
答案是1133.98
我都郁闷了不会做啊！
希望会做的帮个忙不会做的别来骂人啊！
答案是1133.98
我都郁闷了不会做啊！
希望会做的帮个忙不会做的别来骂人啊！
Suppose you pay $X up front. 6 months interest is 4.75%
6 months later, your balance:
(3000 - X) * 1.0475
Pay 1000, and after another 6 months, your balance is 1000, so:
((3000 - X) * 1.0475 - 1000) * 1.0475 = 1000
=> X = (3000 - 1000/1.0475 - 1000/1.0475^2) = 1133.98
我觉得预付金应该是：1000乘以（1+0.095）的六次方+1000乘以（1+0.095）的12次方，再减去2000。
我没有计算器，所以无法验证。