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分段函数是指自变量在不同的取值范围内,其对应法则也不相同的函数.分段函数是一类表达形式特殊的函数,是高考模拟题及高考题中的常考内容.一、以函数概念为基础,正确理解分段函数与几个函数的关系分段函数是一个函数.它满足函数定义中所规定的对应关系,它与其他函数一样也有定义域、值域、对应法则等,只不过它的定义域被“分割”成几段,在各段上对应法则并不统一,因此在书写形式上,要写成f(x)={…,…,…,的形式.分段函数的定义域是各段自变
Piecewise function refers to the independent variable in a different range of values, and its corresponding law is not the same function.Partition function is a special type of expression function, is the college entrance examination simulation questions and college entrance examination questions often test content. , Based on the concept of function, to correctly understand the relationship between the piecewise function and several functions The piecewise function is a function that satisfies the corresponding relationship defined in the function definition, it has the same definition of domain, range, and corresponding law as other functions And so on, except that its domain of definition is divided into several paragraphs by “dividing ”, and the corresponding laws are not uniform in each paragraph. Therefore, in the form of writing, we should write it in the form of f (x) = { The domain of the piecewise function is that of each section