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一般步驟是: (1)寫出函數解析式的一般式,其中包括未知的係數; (2)把引數與函數的對應值代入函數解析式中,得到關於待定係數的方程或方程組. (3)解方程(組)求出待定係數的值,從而寫出函數解析式. 這節課我們進一步研究二次函數解析式的求法.
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