在我们日常生活种时常会遇到排列组合问题,从不同的角度出发,其解题方法也是千变万化的。因此在遇到决排列组合问题时,首先要认真审题,弄清楚所求题目到底是组合问题、排列问题还是排列与组合的综合问题;其次要抓住问题的本质特征,选取合理恰当的方法进行处理。 In our daily life often encounter the problem of permutation and combination, from different perspectives, the problem-solving method is also ever-changing. Therefore, in the event of a combination of permutations and dislocations, we must first conscientiously examine the problem and find out whether the problem sought is a combination problem, a permutation problem or a permutation and combination problem. Secondly, we must grasp the essential characteristics of the problem and choose a reasonable and appropriate method deal with.