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20. 二次函數 y=a(x-2)2+37的圖形與直線y=2017相交於A、B兩點,且 =6,若y=a(x+71) 2+37的圖形與直線y=2017相交於C、D兩點,則 =?(A) 4(B)6(C)
問題詳情
20. 二次函數 y=a(x-2)2+37的圖形與直線y=2017相交於A、B兩點,且
=6,若y=a(x+71) 2+37的圖形與直線y=2017相交於C、D兩點,則
=?
(A) 4
(B)6
(C)3
(D) 5
參考答案
答案:B
難度:
計算中
-1
書單:
沒有書單,新增
上一篇 :
19. 如下圖若y=a1x2、y=a2x2、y=a3x2的圖形分別為S1、S2、S3,則a1、a2、a3的大小順序為何? (A) a2<a3<a1 (B) a1<a2<a3(C) a3<a2<a1
下一篇 :
※第21~25題 試判斷下列敘述是否正確21.已知二次函數y=x2+bx+c圖形的頂點為(-1 ,-2),則此二次函數圖形的對稱軸方程式為x=-1。(A)正確(B)錯誤。
資訊推薦
22.y=2x2+1圖形上的點(1 , 3),以y軸為對稱軸的對稱點(-1 , 3)也會落在y=2x2+1的圖形上。(A)正確(B)錯誤。
23.當a<0時,y=ax2+b的圖形有最高點,最高點坐標為(b , 0)。(A)正確(B)錯誤。
24.我們可以用判別式b2-4ac是正數、負數或0來判別二次函數y=ax2+bx+c與x軸的交點個數。(A)正確(B)錯誤。
25.y=3x2的圖形是以x軸為對稱軸的線對稱圖形。(A)正確(B)錯誤。
27.A: Can you also ____ me finish my art project(計畫)?B: Sure, but I have an old friend in thethe eve
28. We can’t thank you enough and hope____ yousoon. (A) to see (B) see (C) seeing (D) saw
29. I was writing an e-mail____.(A) then (B) yesterday (C) now (D) last night.
30. Jack was hungry, so he stopped ____ beef noodles.(A) eating (B) to eat (C) eat (D) ate
31. Jolin remembered ____ milk at the store. But whenshe got home, she couldn’t find it in her bag.(
32. I ____to play the guitar in my free time.(A) enjoy (B) finish (C) like (D) keep
33. Mom ___ when I ___ the kitchen.(A) was cooking; entered(B) was cooking; was entering(C) cook; en
34. We put eggs, chicken, cheese, and some vegetablesbetween two pieces of bread to make ____.(A) sa
35. Many people like to buy things or clothes on the____, so they don’t go out for shopping.(A) plan
2. 下列四個等式何者不成立?(A)(13+6)-5=13+(6-5)(B)(77-20)-35=77-(20+35)(C)-50+20=-20-(-50)(D)(-23)+〔-(-11)〕=〔-(-
3.計算234×829+234×171=?(A)23400(B)234000(C)23300(D)233000。
4.關於-74,下列何種表示法正確?(A)(-7)×(-7)×(-7)×(-7)(B)(-7)+(-7)+(-7)+(-7)(C)(-4)+(-4)+(-4)+(-4)+(-4)+(-4)+(-4)(
36.A: Thank you for donating blood. B:____.(A) No worries. (B) It’s my specialty.(C) You asked for i
37.A: Guess what! My dog loves to eat sushi.B: Really?____.(A) That’s true. (B) It was terrible!(C)
38.____their help, we finished the work at the lastminute.(A) For (B) Because (C) When (D) Because o
5.關於「相反數」的敘述,下列何者錯誤?(A)-15的相反數可記為-(-15)(B)兩個互為相反數的數,其絕對值相等(C)在數線上,甲、乙兩數與3的距離相同,則甲、乙互為相反數(D)0的相反數為0。
39. I didn’t do well on the test. My father is ___ at me.(A) interesting (B) low (C) common (D) mad
40. It’s no big ___. People sometimes fail.(A) fork (B) joy (C) deal (D) hen
【題組】42. (A) were (B) was (C) do (D) did
【題組】43.(A) slept (B) was sleeping(C) were sleeping (D) am sleeping
【題組】44.(A) to bake (B) bake (C) baked (D) baking