下列四個二次函數的圖形中,哪一個函數圖形的開口最大?甲:y=-x2 乙:y=3x2 丙:y=-2x2 丁:y=x2
九下數學領域補考

Quiz
•
Mathematics
•
9th Grade
•
Hard
莊博智 莊博智
Used 8+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
(A)甲
(B)乙
(C)丙
(D)丁。
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
二次函數 y=(x+2)2 的圖形,向右平移 3 個單位,可以和下列哪一個二次函數的圖形完全疊合?
(A) y=(x+5)2
(B) y=(x-1)2
(C) y=(x+1)2
(D) y=(x-5)2
3.
MULTIPLE CHOICE QUESTION
15 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?
(A)先向左移 5 單位,再向上移 20 單位
(B)先向右移 5 單位,再向上移 20 單位
(C)先向下移 5 單位,再向右移 20 單位
(D)先向上移 5 單位,再向左移 20 單位。
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
下列為四個二次函數的圖形,哪一個函數在 x=2時有最大值 3?
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
三年甲班男、女生各有 20 人,如圖為三年甲班男、女生身高的盒狀圖。若班上每位同學的身高均不相等,則全班身高的中位數在下列哪一個範圍?
(A) 150~155
(B) 155~160
(C) 160~165
(D) 165~170
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
投擲一顆公正的骰子,出現的點數不小於 5 的機率為何?
(A) 1/3
(B) 1/6
(C) 2/3
(D) 1/2
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
一袋子中有 4 顆球,分別標記號碼 1、2、3、4。已知每顆球被取出的機會相同,若第一次從袋中取出一球後放回,第二次從袋中再取出一球,則第二次取出球的號碼比第一次大的機率為何?
(A) 1/2
(B)3/4
(C)2/3
(D)1/2。
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