范围讨论型计算题是近几年来出现的一种新题型 ,这类计算题属融元素化合物知识、数理分析、逻辑推理于一体的综合型题。此类题求解难度较大 ,考生往往难以全面作答。若将数学中一次线性函数和极值法应用于解题中 ,既可提高解题速度 ,又可提高解题的准确性 ,能起到事半功倍之效? The scope-computation-type calculation problem is a new type of problem that has emerged in recent years. This type of calculation problem is a comprehensive problem that combines elemental compound knowledge, mathematical analysis, and logical reasoning. It is difficult to solve such questions. Candidates often have difficulty answering questions. If we use a linear function and extremum method in mathematics to solve problems, we can increase the speed of problem solving and improve the accuracy of problem solving.