問題詳情
8. 有四個二次函數y＝xy＝ 
xy＝－xy＝－ x2，如右圖所示，則標示為B的是哪一個二次函數的圖形？
(A) y＝x2
(B) y＝ x2
(C) y＝－x2
(D) y＝－ x2
參考答案
答案：B
難度：計算中-1
書單：沒有書單，新增
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