問題詳情
14. 小梅將一張畫有拋物線的透明片擺到座標平面上,將拋物線頂點與點(2,3)重合,開口向上時,此拋物線為二次函數y=2(x-2)2+3的圖形,如圖(四)。若她將透明片反轉,使得開口向下且頂點的位置不變,如圖(五),則圖(五)的拋物線為下列哪一個二次函數的圖形?
(A) y= -2(x-2)2+3
(B) y= -2(x-2)2-3
(C) y= -2(x+2)2+3
(D) y= -2(x+2)2-3
(A) y= -2(x-2)2+3
(B) y= -2(x-2)2-3
(C) y= -2(x+2)2+3
(D) y= -2(x+2)2-3
參考答案
無參考答案
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