题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171900-10439.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171901-89195.png)
(Ⅰ)求使不等式
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171901-87375.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171901-85146.png)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171901-31870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171902-94299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171902-38352.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171902-55416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171902-53139.png)
解析
试题分析:(Ⅰ)利用绝对值的几何意义可得范围是
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171902-55416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171903-76389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171903-98685.png)
试题解析:(1)由绝对值的几何意义可知
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171903-19106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171902-55416.png)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171901-31870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171902-94299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171903-62138.png)
由绝对值的几何意义知:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171903-71022.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171904-92331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171904-58089.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171904-41502.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171903-98685.png)
所求
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171904-75779.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171902-53139.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171832-88336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171832-33339.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171833-38949.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171800-84821.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171800-69029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171801-70187.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171801-91071.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171801-14343.png)
A.恒为正数 | B.恒为负数 |
C.恒为0 | D.可以为正数也可以为负数 |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171745-90447.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171745-53391.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171745-27983.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171745-42065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171746-83274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171746-77474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171746-77665.png)
写出车距
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171746-21452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171747-55498.png)
应规定怎样的车速,才能使大桥上每小时通过的车辆最多?
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171724-72322.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171725-57351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171725-17055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171725-37301.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171725-11346.png)
(1)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171725-69201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171725-56906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171725-34944.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171725-35846.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171726-90753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171726-75503.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171726-14817.png)
(3)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171726-61002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171636-80642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171636-57840.png)
①求a的值;
②若
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171636-70451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171637-64923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171637-84378.png)
③设
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171637-94797.png)
最新试题
- 1(文科)长方体中,,,是底面对角线的交点.(Ⅰ) 求证:平面;(Ⅱ) 求证:平面;(Ⅲ) 求三棱锥的体积。
- 2太阳的能量来自氢核聚变:即四个质子(氢核)聚变一个α粒子,同时发射两个正电子和两个没有静止质量的中微子,如果太阳辐射能量
- 3KClO3与浓盐酸在一定温度下反应会产生黄绿色的易爆物二氧化氯,其化学方程式如下:2KClO3+4HCl(浓)═2KCl
- 4书面表达(15分)假设你(Li Hua)想成为Tom的笔友,请你写一封回信给他.信中介绍你自己的名字、年龄、来自哪里,
- 5下列物质与水混合后静置,不出现分层的是 ( )A.三氯甲烷B.苯C.乙醇
- 6室温时,对100mL氯化钠饱和溶液作如下操作,最终甲、乙两烧杯中溶液A.溶质质量相同B.溶质质量分数相同C.均为不饱和溶
- 7竖直导线ab与水平面上放置的圆线圈隔有一小段距离,其中直导线固定,线圈可自由运动,当同时通以如图4所示方向的电流时(圆线
- 8如图,是某工件的三视图,其中圆的半径为10cm,等腰三角形的高为30cm,则此工件的侧面积是( )cm2.A.150π
- 9我国面积居世界第三位,仅次于A.俄罗斯和加拿大B.美国和加拿大C.俄罗斯和印度D.澳大利亚和巴西
- 10下列各句中,加点的熟语使用不恰当的一项是:A.人人都想成为人才,每一个组织都想尽可能地网尽人才,可真弄成人才济济一堂,事
热门考点
- 1下列有关性状和基因的叙述中,正确的是A.能够遗传的性状都是显性性状B.DNA分子上具有特定遗传效应的片段叫基因C.人的身
- 2(本小题满分10分)如图,在平面直角坐标系内,为原点,点的坐标为经过两点作半径为的交轴的负半轴于点(1)求点的坐标;(2
- 3阅读下面的文言文,完成下面问题。 及智宣子卒,智襄子①为政,与韩康子、魏桓子宴于蓝台。智伯戏康子而侮段规。智国闻之,谏
- 4In Japan, people sometimes give special gifts. But they are
- 5如图,已知正方形ABCD中,BE平分∠DBC且交CD边于点E,将△BCE绕点C顺时针旋转到△DCF的位置,并延长BE交D
- 6下列依次在①②③处填入的词语和句子,最恰当的一项是古人赏花,各有所好。就花色而言,有人喜欢浓妆,要求色彩①;有人偏爱淡妆
- 7在△ABC中角A、B、C的对边分别是a、b、c,若(2b-c)cosA=acosC,则cosA=______.
- 8下列各组词语中,没有错别字得一组是:A.凑合 缔造 一诺千斤 一着不慎,全盘皆输B发轫 会晤 要言不
- 93 You can’t imagine such a beautiful girl ______ say such ru
- 10已知函数f(x)=(ax2+x)ex,其中e是自然对数的底数,a∈R.(1)当a>0时,解不等式f(x)≤0;(2)当a