题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035917-12237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035917-80593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035917-76203.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:根据二次函数的性质得到抛物线开口向上,抛物线y=x2+3x+c的对称轴为直线x=
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035918-18505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035918-36987.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035918-65026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035917-78140.png)
故选B.
考点:二次函数图象上点的坐标特征.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035910-51142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035911-80590.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035905-11772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035905-55281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035905-96642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035905-95869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035905-15269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035854-97522.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035854-45117.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035855-60997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035855-31755.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035855-61448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035855-38582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035855-49679.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035856-53047.jpg)
(1)求点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035856-52977.png)
(2)求四边形
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035856-25178.png)
(3)抛物线上是否存在点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035856-78419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035857-69093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035856-78419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-45661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-97191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-31332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-23989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-60194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-93134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-97191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-41446.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-56571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-84476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-65396.jpg)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-84476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-27862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-33826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-84476.png)
(2)在
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-93134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-93134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-60194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-70601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-70601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-84476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-84476.png)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-93134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-96005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-12733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-82616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-31332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-56965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-96005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-43928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-33826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-82616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-12733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-43928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-43928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-31332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-33826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-96005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035846-44282.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035831-35235.png)
A.a<0 | B.a﹣b+c<0 |
C.![]() | D.4ac﹣b2<﹣8a |
最新试题
- 1图中a、b是北半球某地理要素等值线,且a>b。M、N分别位于图中a、b线之中点。读图回答下题。若a、b是纬线,M、N在同
- 2对于生命的理解下列观点正确的是[ ]A.只有人类的生命才是地球上最珍贵的财富 B.人类是地球上所有生命的主宰 C
- 3双向翻译(共5小题;每小题2分,满分10分)请根据上下文内容,将文中划线部分译成汉语或者英语,并将答案转写到答题卡上。
- 4读图,回答问题:小题1:甲、乙、丙三艘轮船同时沿图示方向以相同的速度驶向180°经线,则下列说法正确的是A.同时到达B.
- 5我国的行政区域划分为( )A.省、市、县B.省、市、乡C.省、县、乡D.市、县、乡
- 6【课内阅读】 院门外,便是一条小河。河水细细的,却漫着一大片的净沙;全没白日那么的粗糙,灿灿地闪着银光,柔柔和和得像水
- 7JPM17.2A精密双轴弧摆高速精磨机主要用于中等直径(ϕ40mm以下)凸凹透镜的精磨.机床主轴高速旋转并做精密准球心摆
- 8Thereportersaid that theUFO east to westwhenhesawit.A.trave
- 9六月的北海,玉兰花开,人们在很远的地方都能闻到玉兰花香,主要原因是( )A.分子的质量和体积都很小B.分子之间是有间隔
- 10句中划线的字解释都正确的是[ ]①他触目伤怀,自然感情不能自已。 ②于是大家放开喉咙读一阵书,真是人声鼎沸。 A
热门考点
- 1当前,在经济往来的结算中经常使用的信用工具是转帐支票、汇票和信用卡。回答1~2题。1、安阳一家公司从新疆某工厂订购一批货
- 2肝脏位于我们的右上腹,它是人体器官中的庞然大物,占人体质量的135它由大约2500亿个肝细胞组成,每个肝细胞直径约为0.
- 3在下列中填写相应的物质名称、化学式、物质类别(指单质、氧化物、酸、碱、盐):物质名称氢氧化钡硝酸钠化学式Fe2O3H2C
- 4医院确认糖尿病的常用方法及结果是[ ]A.加入新制的斐林试剂,加热后出现砖红色沉淀 B.加入碘一碘化钾溶液,出现
- 5(2分)右图是某包装袋上的部分文字说明。(1)这里的钙、铁、磷、锌指的是 (填“分子”、“原子”或“
- 6阅读下文,完成后面题目。莫言:中国土地上的语言奇迹张 柠面对如此残酷的伤痛记忆,莫言并没有使自己的小说变成“伤痕文学”,
- 7—Which do you prefer, a glass of water or a cup of tea?—
- 8I can play the drums, ____ I can"t play ____ well. [
- 9The island where these rare birdsnest has been declared a __
- 10某有机物X加氢反应后的还原产物是CH3CH(CH3)CH2OH,关于X的下列说法正确的是[ ]A.X可能是乙醛的