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等比性质的证明给我们如下启示:当已知条件是以等比形式(或连比形式)出现时,可以设它们的比值为 k,通过 k 建立分子和分母间的关系,使问题获解.这种解题方法称为设 k 法.下面举例说明此法在解竞赛题方面的应用.
The proof of the analogy property gives us the following enlightenment: When the known conditions occur in an equal ratio (or proportional form), they can be set to the ratio k, and the relationship between the numerator and the denominator can be established by k to solve the problem. This method of solving the problem is called setting the k method. The following example illustrates the application of this method in solving competition problems.