题目
题型:单选题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135228-29917.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135228-72123.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135228-72686.png)
A.函数![]() |
B.函数![]() |
C.函数![]() |
D.函数![]() |
答案
解析
可得函数f(x)必在区间(0,4)内有零点因为f(0)>0,f(1)f(2)f(4)<0,则f(1),f(2),f(4)恰有一负两正或三个都是负的,
函数的图象与x轴相交有多种可能,如图所示:
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135229-21846.jpg)
所以函数f(x)必在区间(0,4)内有零点,
故选D.
核心考点
试题【若函数的图象是连续不断的,且,,则下列命题正确的是( ).A.函数在区间(0 , 1)内有零点B.函数在区间(1 , 2)内有零点C.函数在区间(0 ,】;主要考察你对函数的零点等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135219-17655.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135219-40205.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135219-20586.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135207-45750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135207-27495.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135208-46258.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135208-70269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135208-84959.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135208-78442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135209-14922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135209-90687.png)
解集为
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135209-98209.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135209-14922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135210-84067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135210-92093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135210-79473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135210-26454.png)
最大值为
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135211-36249.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135204-55073.png)
A.![]() | B.![]() | C.3 | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135200-12507.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135200-23856.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135200-96809.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819135158-73507.png)
最新试题
- 1金银是商品交换长期发展的产物。[ ]
- 2:如图,四棱锥P—ABCD中,底面ABCD是矩形,PA⊥底面ABCD,PA=AB=1,AD=,点F是PB的中点,点E在边
- 3一个物体受到的合外力恒定,且不为零时,则[ ]A、这物体可能做匀加速曲线运动B、这物体一定做匀加速直线运动C、这
- 4Joe worked so hard that ________ he made himself ill.[ ]
- 5Is _____he said really true?A.thatB. whatC.whyD.whether
- 6阅读理解。 Welcome to the zoo. You can see the Indian elephan
- 7某个命题的结论为“x,y,z三个数中至少有一个为正数”,现用反证法证明,假设正确的是A.假设三个数都是正数 B.假设三个
- 8古希腊城邦政治的核心力量是A.公民B.贵族C.执政官D.首席将军
- 9某同学为探究光照对种子的萌发有无影响,设计如下探究方案:将两份等量的大豆种子分别放在两个培养皿中,均置于30°C和水分适
- 10请用一句话概括下面漫画的主题。(不超过40字)答:
热门考点
- 1Do you know the man who _________on the road just now?A.lied
- 2文学常识与诗文填空。(5题限选4题)(8分)(1)唐开元初年, 与贺知章、张旭、包融号称“吴中四士”。我
- 3如图,将一副三角板叠放,则△AOB与△DOC的面积之比等于( )。
- 4完形填空。 There were two screws (螺丝钉) in an engine. One was
- 5— What bad weather! — Yes. The radio says it will be even __
- 6f(x) 是定义在R上的奇函数,则 f(0)=______.
- 7科学家证明,在地球上生命发生之前,确实经历了由_____________转变为_____________的化学进化过程。
- 8如图所示,AB⊥CD于点C,CE⊥CF,则图中共有______对互余的角.
- 9(12分)阅读材料,回答问题。材料一:某中学就学生的日常行为对本校500名学生进行了问卷调查,调查结果如下:调查内容回答
- 10读我国温度带划分示意图,回答问题。(1)填出温度带名称:A.________带;B.________带;C.______