The range of the numbers in set S is x, and the range of the numbers in set Tis y. If all of the numbers in set Tare also in set S, is x greater than y ?
(1) Set S consists of 7 numbers
(2) Set T consists of 6 numbers
请问一下各位学霸,这道题目的答案是x大于等于y,题目问的是 is x greater than y ? 是不是可以求出no 也算答案,is开头的问题,答案标准是什么?
Is 开头的问题,就是让你回答‘是’或‘否’的问题,所以如果那个条件能一直得到‘yes’ 或一直得到‘ no’ ,那就是充分条件;如果一会得到‘yes’一会得到‘no’,那就不是充分条件。比如你的问题中 ‘is x greater than y ?’ ,条件如果推出x is always greater than y 或者 x is always smaller than y, 那都是充分条件。