
二次函數(會考)
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
liling chang
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13 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
坐標平面上有一函數y=24x2-48的圖形,其頂點坐標為何?
(0 , -2)
(1 , -24)
(0 , -48)
(2 , 48)
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
在坐標平面上,方程式y=2x2-9的圖形交x軸於A、A1兩點;方程式y=2(x-13)2-8的圖形交x軸於B、B1兩點;方程式y=-2(x+17)2+5的圖形交x軸於C、C1兩點。比較 AA1、 BB1 、 CC1 的長度,下列關係何者正確
AA1 = BB1 = CC1
AA1 = BB1 > CC1
AA1 < BB1 < CC1
AA1 > BB1 > CC1
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
小梅將一張畫有拋物線的透明片擺到坐標平面上,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(一)。若她將透明片反轉,使得開口向下且頂點的位置不變,如圖(二),則圖(二)的拋物線為下列哪一個二次函數的圖形?
y=-2(x-2)2+3
y=-2(x-2)2-3
y=-2(x+2)2+3
y=-2(x+2)2-3
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列哪一個二次函數,其圖形的對稱軸為x=2?
y=(x+2)2+4
y=-(x-2)2+1
y=x2-2
y=x2-2x+2
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
在坐標平面上,y=2x2-8的圖形經由下列哪一種方式移動後,可得到y=2(x-5)2+12的圖形?
先向左移5單位,再向上移20單位
先向右移5單位,再向上移20單位
先向下移5單位,再向右移20單位
先向上移5單位,再向左移20單位
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
已知二次函數y=ax2+k,其中a<0、k>0,則下列哪一個選項可能是此二次函數的圖形?
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如圖,A、B分別為y=x2上兩點,且 AB ⊥y軸。若 AB =6,則直線AB的方程式為何?
y=3
y=6
y=9
y=36
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