題庫堂
檢索
題庫堂
首頁
數學
英文學習
政治學
統計學
經濟學
藥理學
中醫藥物學
財政學
法學知識
公共行政
警察學
BI規劃師
財務管理
公共衛生學
工程經濟學
電力電子學
當前位置:
首頁
12. 方程式 2x2+(m2-3)x-9=0 的兩根互為相反數,求 m=? (A) (B) (C) (D)
問題詳情
12. 方程式 2x2+(m2-3)x-9=0 的兩根互為相反數,求 m=?
(A)
(B)
(C)
(D)
參考答案
答案:C
難度:
簡單
0.609
書單:
沒有書單,新增
用户評論
【用戶】
李家碩
【年級】國一下
【評論內容】因為兩根互為相反數,所以此方程式 x 的...
上一篇 :
11. 如果一元二次方程式 x2-kx+k-1=0 的兩根相等,則 k=? (A)-2 (B) 2 (C)-3 (D) 3
下一篇 :
1.下列關於蓋章和簽名效力之敘述,何者正確?(A)效力同等(B)印章效力優於簽名(C)簽名效力優於印章(D)印章經二人簽名證明效力即與簽名同
資訊推薦
2. Convenience stores like 7-11 and Family Mart are ______ in Taiwan. You can spot them on practical
3. They quickly walked past the decrepit market, disturbed by the ______ odor of the rotting vegetab
4. The violinist delivered a ______ performance that displayed none of the passion and warmth he was
5. The two girls exchanged ______ glances across the dinner table, trying to keep their surprise tot
6. Many parents feel ______ to pay for at least part of the wedding, but actually it is never theirr
7. You should restrict your presentation to issues ______ to our current discussion. We do not have
Historically, as countries have developed industrially, they have undergone declines in death ratesf
【題組】9. According to paragraph 1, what is useful about the demographic transition model?(A) It helps
【題組】10. In paragraph 2, which of the following is NOT mentioned as relevant to the high birth rates
【題組】11. What can be inferred from paragraph 2 about the effect of epidemic diseases on population du
【題組】12. The word “agrarian” in paragraph 3 is closest in meaning to______ .(A) basic(B) menial(C) fa
【題組】13. According to paragraph 4, what was one of the main causes of the drop in birth rates?(A) The
【題組】14. The word “equilibrium” in paragrph 6 is closest in meaning to______ .(A) economic(B) stable(
【題組】15. According to paragraph 6, what is at the root of the huge population increases during the tw
【題組】16. Why does the author mention the optimism felt in some quarters about future population trend
【題組】17.Choose the letter,(A)(B) (C) (D) in paragraph 4, which shows where the following sentence sho
II. Discourse Analysis 10% As Bitcoin, the world’s biggest cryptocurrency, keeps hitting record
III. Reading Comprehension (8%) Around the world, governments and automakers are promoting elec
【題組】24. Which of the following is used synonymously with plug-in vehicles ?(A) Electric cars. (
【題組】25. In a city that generates electricity by burning coal, how environmentally friendly are the f
【題組】26. What does “artisanal” cobalt most likely refer to?(A) Cobalt mined with craftsmanship.
1.下列關於血親之敘述,何者錯誤?(A)直系血親係己身所從出之血親 (B)直系血親係從己身所出之血親(C)旁系血親係非直系之血親 (D)旁系血親係與己身不同源之血親
4.有一長方形紙張,其長比寬的 3 倍少 10 公分。設此長方形紙張的長為 x 公分,若其周長為 60 公分,則依題意可列式為何?(A) (B) (C) 2[x+3(x+10)]=60(D) 2[x+
23. 下圖中,A、B 為直線 L 上的相異兩點,C 點為直線 L 外的一點,且 ,△ABC 的面積為 60,則 C 點與直線 L 的距離為何? (A) 6(B) 10(C) 12(D) 15
21.如圖(十二),平行四邊形 ABCD 中,M、N 分別為 的中點,若△PQB 的面積為 30,求五邊形 PQNDM的面積=? (A)48 (B)54 (C)60 (D)90