某个与解题密切相关；但题目本身并未指定要求的数学未知量，不妨称为“非必求量”．在数学解题中，若能回避求解这个“非必求量”，而利用有关概念、性质，将相关条件进行灵活转换，往往会简化运算过程，降低解题难度，提高解题智慧．本文拟通过求参数的取值范围，对上述观点 A certain problem is closely related to the problem; but the title itself does not specify the required mathematical unknown quantity, it may be called “non-required quantity.” In mathematics problem solving, if we can avoid solving this “non-required quantity”, and use the relevant concepts, properties, and flexible conversion of relevant conditions, it will simplify the calculation process, reduce the difficulty of solving problems, and improve the wisdom of problem solving. This article intends to find the above perspective by finding the range of parameters