题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060245-89602.png)
(1)若方程有两个实根,求实数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060245-97960.png)
(2)设函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060245-69698.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060245-68670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060246-73608.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060245-68670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060246-73608.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060246-55144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060246-81318.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060246-19956.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060247-53004.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060247-34289.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060247-72973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060247-48848.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060247-73628.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060248-16979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060248-65129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060248-78146.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060248-21737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060249-94537.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060249-75288.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060249-68706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060249-95230.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060249-60400.png)
∴综上所述
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060250-85860.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060250-63091.png)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060225-25861.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060225-65359.png)
A.![]() | B.f (x)g (x) |
C.f ( x ) – g ( x ) | D.f ( x ) +g ( x ) |
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060213-64554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060213-64554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060213-44556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060213-64554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060214-72385.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060214-28708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060214-98480.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060214-60062.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060215-21796.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060215-92734.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060204-33671.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060205-97587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060205-59881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060205-54211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060205-84778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060206-95619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060206-71895.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060205-97587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060206-39173.png)
表1
i | 1 | 2 | 3 |
f(i) | 2 | 3 | 1 |
表2
i | 1 | 2 | 3 | 4 |
f(i) | | 3 | | |
(1)已知表2表示的映射
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060206-82413.png)
(2)若映射
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060207-32191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060207-97742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060148-30673.png)
那么方程x3+x2-2x-2=0的一个近似根(精确到0.1)为
A.1.2 | B.1.3 | C.1.4 | D.1.5 |
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060124-69402.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060124-58011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205060125-77245.png)
A.26 | B.33 | C.36 | D.42 |
最新试题
- 1要在光屏上得到和物体一样大小的像,下列元件中应选用( )A.凸透镜B.凹透镜C.凸面镜D.平面镜
- 2下列说法正确的是A.低碳生活倡导减少温室气体排放,CO2、CH4等是常见的温室气体B.电解精炼铜时,当阳极质量减少3.2
- 3我国钓鱼岛及其周边海域生物种类繁多,如图是该区域的四种生物,有关说法不正确的是( )A.剑尖枪乌贼身体柔软是软体动物B
- 4关于x的方程2x-3=1的解为 [ ]A.-1B.1C.2D.-2
- 5计算:(1)8+12+2-3(2)12m4m+6mm9-2m21m.
- 6有关下列的说法不正确的是( )A.教室里的课桌,没人搬动时总能保持静止状态,是因为课桌不受力B.在平直轨道上做匀速运动
- 7“超级杂交水稻”亩产破900公斤,它的培育者是( )A.法布尔B.袁隆平C.巴斯德D.马克•吐温
- 8下列图片的史实都发生在文革时期,发生最早的是 [ ]A.粉碎四人帮的宣传画B.***和林彪接见红卫兵C.五一六通
- 9“舜土无私万象涵,经纬地脉赖君探。若无妙手寻油出,赤县焉知是哪堪?”这首诗歌颂的是 [ ]A.李时珍 B.詹天佑
- 10翻译1、决定做某事_______________2、视察工厂_______________3、非常后悔_________
热门考点
- 1与秦岭——淮河一线相吻合的是:( )A.季风区和非季风区的分界线B.地势第二、三级阶梯的分界线C.亚热带和暖温带的分
- 2“种豆南山下,草盛豆苗稀”,下列属于生物因素对豆苗生存影响的是( )A.阳光B.水分C.杂草D.温度
- 3在日常生活中我们经常发现,锅中的自来水刚加热时,水中就有气泡逐渐冒出;打开汽水瓶盖,汽水中也有气泡冒出.可见,气体的溶解
- 41、下列诗句是谁说的? “我劝天公重抖擞,不拘一格降人才。” “砍头不要紧,只要主义真。” _________
- 5Long, long ago people didn"t know that the moon _____ around
- 6卫星云图上,华北平原是一片绿色,这说明华北平原的天气状况是[ ]A.阴天B.晴C.下雨D.下雪
- 7如图,E、B、F、C四点在一条直线上,再添一个条件仍不能证明△ABC≌△DEG的是( )A.AB=DE
- 8点A在x轴上,距离原点4个单位长度,则A点的坐标是
- 9如图,把正方形ACFG与Rt△ACB按如图(甲)所示重叠在一起,其中AC=2,∠BAC=60°,若把Rt△ACB绕直角顶
- 10Wuhan is hot at this time of year. You"d better _cl