题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091426-25047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091426-98231.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091426-92159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091427-41912.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091427-97846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091427-27536.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091427-27654.png)
解析
试题分析:(1)本小题可利用对勾函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091428-39959.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091428-97687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091428-95890.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091428-31563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091428-38807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091427-27536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091429-20346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091429-90060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091429-97316.png)
试题解析:(1)因为函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091426-25047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091426-92159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091428-97687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091426-25047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091427-41912.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091429-35815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091430-74034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091426-25047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091430-14361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091430-41373.png)
(2)等价于方程
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091428-38807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091429-20346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091429-97316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091430-17599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091431-36831.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091431-21173.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091429-90060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091429-97316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091431-92312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091431-11568.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091432-81718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091432-57504.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091432-51393.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091432-81496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091432-17499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091433-13035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091431-92312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091429-97316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091433-18092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091433-32547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091427-27536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091433-11266.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091434-10251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091427-27654.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091427-27536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091427-27654.png)
(另解:由于
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091429-90060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091434-64459.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091434-99113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091434-27788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091435-82114.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091435-39072.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091435-25475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091427-27536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091427-27654.png)
核心考点
举一反三
A.y随x的增大而增大 |
B.不论x为何值,总有y>0 |
C.必经过二、四象限 |
D.图象必经过点(0,5) |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091331-54119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091331-25139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091331-42242.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091332-99845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091332-77470.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091332-14765.png)
(2)求数列{an}、{bn}的通项公式;
(3)若对任意实数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091332-55945.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091332-41696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091235-40392.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091235-68292.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091235-12535.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091219-24302.png)
A.2 | B.3 | C.4 | D.5 |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091134-47182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091134-76528.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204091134-53805.jpg)
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