問題詳情
9.二次函數 y＝ax2＋bx＋圖形的最高點為（3，4），則點（a，b）落在第幾象限？
(A)一
(B)二
(C)三
(D)四。
(A)一
(B)二
(C)三
(D)四。
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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