
九下1-1數學
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Medium
蔡佩旻 蔡佩旻
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12 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列何者為二次函數?
y=-5x+4
y=-3x2+4
y=|-x2+6|
y=42-2x
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
關於二次函數 y=-2(x-3)2+5 的描述,下列何者錯誤?
圖形開口向下,有最高點坐標(3 , 5)
對稱軸為直線 x=3
圖形與 x 軸沒有交點
函數值恆不大於 5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
將二次函數 y=-2(x+2)2-1 的圖形向右平移 3 個單位長,向下平移 2 個單位長,所形成新的二次函數為何?
y=-2(x-1)2+1
y=-2(x+5)2-3
y=-2(x-1)2-3
y=-2(x+5)2+1
4.
MULTIPLE SELECT QUESTION
1 min • 1 pt
將兩個二次函數 y=2x2+1 與 y=-2x2+1 畫在同一坐標平面上,下列有關這兩個函數圖形關係的敘述,哪些是正確的?〔90. 基測Ⅰ改〕
有相同的開口方向
圖形都是拋物線
有相同的頂點坐標
有相同的對稱軸
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
如圖,若 y=ax2、y=bx2、y=cx2 的圖形分別為 S1、S2、S3,則 a、b、c 的大小順序為何?
a<b<c
c<b<a
b<a<c
b<c<a
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
請問二次函數 y=-2(x+5)2-8 的圖形與 x 軸的交點個數為多少個?
2 個
1 個
0 個
資料不足,無法判斷
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
已已知二次函數 y=a(x-h)2+k 在 x=2 時,函數 y 有最大值-3,且圖形通過點(3 , -8),則 a+h+k=?
2
-3
-5
-6
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