波利亚云:“特殊化是从考虑一组给定的对象集合过渡到考虑该集合中一个较小的集合,或仅仅一个对象”.由于在特殊情况下,矛盾比较集中,常常可以突出问题的关键,便于揭示其本质,因此,我们面对一个数学问题,当复杂性掩盖着解法时,常常可以先考虑其特殊情形,用特殊探路,然后推及一般,化远为近、化生为熟,从而使问题最终得以解决.目前,在客观题求解中,特殊化方法已引起人们的普遍重视,但它在主观题中的运用还不够充分,因此本文试 Polyana: “Specialization is the transition from considering a given set of objects to considering a smaller one, or just an object in the set.” Because of the concentration of contradictions in special situations, it is often possible Therefore, we face a mathematical problem. When the complexity conceals the solution, we can often consider its special circumstances first, use special ways, and then push the general, far and near, So that the problem can be finally solved.At present, the specialization has attracted people’s attention in the objective problem solving, but its application in the subjective question is not enough, so this paper tries