二次函数的概念与理解
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二次函数的图形和性质文章源自公式库网-https://www.gongshiku.com/html/201808/chuzhongshuxuegongshizhiercihanshugongshi.html
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二次函数与一元二次方程之间的关系文章源自公式库网-https://www.gongshiku.com/html/201808/chuzhongshuxuegongshizhiercihanshugongshi.html
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用待定系数法求二次函数的解析式文章源自公式库网-https://www.gongshiku.com/html/201808/chuzhongshuxuegongshizhiercihanshugongshi.html
