在解题中,恰当引入参数,能使一些较难的数学问题得以简单地解决.笔者在重温本刊《问题征解》栏目各期问题时发现:有一部分问题,如果恰当引入参数,解决起来相当简单,下面通过几个问题介绍笔者的解法,供大家参考.例(年第、期问题)设直角三角 In the problem solving, the appropriate introduction of parameters, can make some difficult mathematical problems can be simply solved.I revisit the issue of “problem solves” section of the issue found that: there are some problems, if the appropriate introduction of parameters to solve Up is quite simple, following a few questions to introduce the author’s solution, for your reference. Example (year, period issues) set up right triangle