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数形结合求分段函数的零点个数，本题可借助一元二次方程求解
为助力高考数学，特讲解高三一轮复习中的易错题1000道，根据复习进度，逐步讲解错题，涉及高一到高三的基础内容；研究基础习题，透析高效解法，您值得学习，本节内容是数形结合求分段函数的零点个数@石轩述数学 @头条教育
高三数学一轮复习错题没人讲解，可看这里，解决你没搞明白的问题0/893
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