题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133833-35852.png)
(1)若x=1时
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133833-13175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133833-69579.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133834-37264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133833-13175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133834-96458.png)
(3)若对任意
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133834-90572.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133834-57690.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133834-48750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133833-69579.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133835-27394.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133835-54865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133834-37264.png)
解析
试题分析:(1)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133835-28494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133835-19747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133835-27394.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133836-73932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133836-81517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133836-96507.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133836-87419.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133833-13175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133837-82333.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133835-27394.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133837-75270.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133837-71199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133837-59878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133833-13175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133838-37738.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133838-18786.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133838-80551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133838-11456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133839-65374.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133839-76398.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133836-81517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133833-13175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133839-62575.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133839-26024.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133836-87419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133833-13175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133840-35774.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133833-13175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133840-26958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133835-54865.png)
综上所述,
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133840-94185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133840-61626.png)
(3)∵任意
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133834-90572.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133834-57690.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133834-48750.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133841-30134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133841-63765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133835-28494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133841-88890.png)
而
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133835-28494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133841-26592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133842-54337.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133834-37264.png)
点评:深刻理解导数的几何意义及熟练利用导数求极值、最值是解题的关键.分类讨论思想和转化思想是解题常用的思想方法,应熟练掌握.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133817-32399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133818-98351.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133811-81084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133812-73138.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133812-26959.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133812-13328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133813-31888.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133813-68791.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133812-13328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133813-55752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133813-43302.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133812-13328.png)
则下列命题为真命题的是
A.![]() | B.![]() | C.仅有![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133807-79790.png)
A.3 | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133802-14676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133802-19199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133802-89080.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133802-14676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133802-41370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133802-82523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133802-14676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133755-45846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017133755-72667.png)
A.![]() |
B.![]() ![]() |
C.![]() |
D.![]() ![]() |
最新试题
- 1马克思主义的产生实现了哲学史上的伟大变革。以下观点不能体现这一变革的有A.人民群众是历史的创造者B.物质决定意识,意识对
- 2解下列方程:(1)12x=2x+3(2)xx-1-1=3(x-1)(x+2).
- 3下图为人体体液物质交换示意图。下列有关叙述不正确的是[ ]A.①、②、③依次为淋巴、血浆、组织液 B.乙酰胆碱可
- 4You will soon _____ if you continue working day and night li
- 5请用简洁的文字说明下面漫画反映了一种什么现象,并针对这种现象提出自己的观点或看法。现象:________________
- 6已知数阵中,每行的3个数依次成等差数列,每列的3个数也依次成等差数列,若,则这9个数的和为( )A.16B.32C.
- 7将1mL甲醛蒸气溶于12mL冰醋酸中,再加入1g果糖和12g葡萄糖,所得的混合物中含碳元素的质量分数是[ ]A.
- 8平面直角坐标系中, 角的终边上有一点P,则实数的值为 .
- 9如图9所示,一光滑的半径为R的半圆形轨道(B为最高点,A为最低点)竖直放在水平面上,一个质量为m的小球以某一速度冲上轨道
- 10已知i是虚数单位,m和n都是实数,且m(1+i)=5+ni,则m+nim-ni=( )A.iB.-iC.1D.-1
热门考点
- 1China came up to the sixth place in the world _____ economic
- 2(本题满分14分)已知数列中,对任意都有:.(1)若数列是等差数列,数列是否为等比数列?若是,请求出通项公式,若不是,请
- 3下列植物按从简单到复杂的顺序排列的是( )A.水绵→葫芦藓→肾蕨→油松→玉米B.葫芦藓→水绵→肾蕨→油松→玉米C.水绵
- 4第一次世界大战前后,帝国主义国家间的主要矛盾的变化是 A.由法德矛盾到美日矛盾B.由英德矛盾变
- 5对任意实数x、y,函数f(x)满足f(x)+f(y)=f(x+y)-xy-1,若f(1)=1,则对负整数n,f(n)的表
- 6如图所示的四种情景中,人对物体做了功的是[ ]A.B.C.D.
- 7书面表达。 近年来随着私家车的增多,交通事故也频繁发生。假设你是某市报社的一名记者,采访有关部门,调查2010年
- 8p能级最多可容纳的电子数为( )A.10B.6C.3D.1
- 9(1)(2)[× 24]÷ 5(3)
- 10己知实数m≠0,又a=(x2-1,mx),b=(mx,1m),设函数f(x)=a•b.(1)若m>0,且f(-2)=f(