急 求帮忙啊 谢啦~

daviddai1990

请问 （2）到底是怎么回事啊？ 看不懂~

198.19263-!-item-!-187;#058&012213

Did one of the 3 members of a certain team sell at least 2 raffle tickets yesterday?



(1)The 3 members sold a total of 6 raffle tickets yesterday.



(2)No 2 of the members sold the same number of raffle tickets yesterday.

--------------------------------------------------------------------------------------------------------------------------------------------------------【答案】D

【思路】

(1) 設3人賣的數量為a,b,c

(a,b,c)={(6,0,0) (1,1,4) (1,2,3) (2,2,2)…}

(2) (a,b,c)={(0,1,2) (1,2,3),(3,4,5)…}　　

arleneyau

每个人卖的数量都不一样，那3个人最少最少只能分别卖0，1，2件。。因为不能卖负数件对吧~~

daviddai1990

非常感谢~