
九下二次段考範圍(中等)
Authored by 蔡佩旻 蔡佩旻
Mathematics
9th Grade
Used 1+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若二次函數 y=2x2+bx-2 有最小值為-4,則 b=?
4
-4
±4
±8
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪一個二次函數的圖形,完全都在 x 軸的下方?
y=2x2+1
y=2x2-1
y=-2x2+1
y=-2x2-1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
欲作二次函數 y=2(x-3)2+2 的圖形,此圖形可由函數 y=2x2 的圖形向右平移 h 個單位後,再向上平移 k 個單位而得到,則數對(h , k)在第幾象限?
一
二
三
四
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若我們將二次函數 y=-(x-3)2+5 的圖形向左移 5 個單位,再向下移 2 個單位後,會變為下列哪一個二次函數的圖形?
y=-x2-4x-1
y=-x2-4x-7
y=-x2+16x-61
y=-x2+16x-67
5.
MULTIPLE CHOICE QUESTION
1 min • 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+2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
關於二次函數 y=-x2+2 圖形的敘述,下列何者錯誤?
與 x 軸交於(2 , 0)、(-2 , 0)
開口向下
與 y 軸交於(0 , 2)
頂點為(0 , 2)
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
二次函數 y=(x-1)2+3,若-2 ≤ x ≤ 2,則 y 的最大值為多少?
-2
2
6
12
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