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一般地,分段函数是指在自变量的不同取值范围内,函数有着不同的对应关系。它是一个函数,而不是几个函数。分段函数问题往往考查函数、不等式、图像、导数等知识,是高考经久不衰的考查热点。下面结合2017年部分高考试题,介绍以分段函数为载体的求函数值、解不等式、求参数范围、确定方程解的个数等题型,供同学们学习时参考。一、求函数值
In general, the piecewise function means that the functions have different correspondences within different values of the independent variables. It is a function, not a few functions. Segmented function problems often test functions, inequalities, images, derivatives and other knowledge, is the enduring test hot college entrance examination. The following part 2017 college entrance examination questions, introduced to the piecewise function as the carrier seeking function value, solving inequalities, seeking parameters range, to determine the number of equations and other questions for students to learn reference. First, find the function value