同学(1) At least five 5-member subcommittee can be formed if 5 people are chosen to form a subcommittee. (2) The total number of all possible 3-member subcommittee if 3 people are chosen is 20. 侬先把条件补一补 条件1显然是有问题的呢 我觉得是大家背出来的题目有出入 这个好像是比较清楚的
不好意思我请教一道题 Q113: We call a number perfect square that is square of an integer. If N is a perfect square, which one is the least perfect square that is larger than N? 这道题实在没有方向