已知二次函數y=2x2+c的圖形通過(2 , 7),則最低點為下列何者?
3下 1-1 二次函數的圖形與最大值、最小值

Quiz
•
Mathematics
•
9th Grade
•
Medium
康軒數位 康軒數位
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
(0 , 5)
(0 , 3)
(0 , 1)
(0 , -1)
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
關於二次函數y=-(x-2)2+1的敘述下列何者錯誤?
圖形有最低點(2 , 1)
圖形的對稱軸為直線x-2=0
函數有最大值1
圖形為拋物線
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列何者是表示圖中拋物線的二次函數?
y=(x-2)2+1
y=(x+2)2+1
y=-(x-2)2+1
y=-(x+2)2+1
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在坐標平面上,y=2x2-8的圖形經由下列哪一個方式移動後,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
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
阿默將200公分的繩子剪成兩段,各圍出一個正方形,若假設其中一個正方形的邊長為x公分,兩正方形的面積和為y平方公分,則依題意可列出下列哪一個二次函數?
y=2x2+100x+2500
y=2x2-10x+250
y=2x2-100x+2500
y=x2-50x+1250
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪一個函數圖形有最高點?
y=-x+3
y=-x2+3
y=x-3
y=x2-3
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪一個選項不是二次函數?
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