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作者: guo573874201 时间: 2011-9-5 09:27
标题: 帮助帮助！！
1.For any integer k greater than 1, the symbol k^* denotes the product of all the fractions of the form 1/t, where t is an integer between 1 and k, inclusive.What is the value of 5^*/4^*?

A.5
B.5/4
C.4/5
D.1/4
E.1/5答案E 为啥呢
2.If Antonio bought two half-gallon cartons of ice cream during a special sale, what percent of the total regular price of the two cartons did he save?
(1)Antonio paid the regular price for the first carton and received the second carton for half the regular price.
(2)The regular price of the ice cream Antonio bought was $4.00 per half-gallon carton.此题中文没懂请求翻译并解释万分感谢

作者: garlicwu 时间: 2011-9-5 14:41
1.
k* = 1 × （1/2）×（1/3）× （1/4）× ... ... × （1/k）
5* = 1 × （1/2）×（1/3）×（1/4）×（1/5）
4* = 1 ×（1/2）×（1/3）×（1/4）

2. A 以促销价买2桶ice cream，问这2桶他省下的钱占原价格的百分比
条件1：第一桶原价，第二桶半价。sufficient
条件2：原价是4刀。insufficient

作者: angel1993627 时间: 2015-6-3 06:17

garlicwu 发表于 2011-9-5 14:41
1. k* =  1 × （1/2）×（1/3）× （1/4）× ... ... × （1/k）5* = 1 × ...

为什么我的第一反应 between 1 and 5 是不包括1和5本身的呢

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