【题文】(本小题满分14分)计算:(Ⅰ); (Ⅱ).
【题文】(本小题满分14分)计算:(Ⅰ); (Ⅱ).
题型:难度:来源:
【题文】(本小题满分14分)计算:
(Ⅰ)
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011339-84444.png)
;
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011339-93597.png)
.
答案
【答案】(Ⅰ)
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011340-24769.png)
;(Ⅱ)2.
解析
【解析】
试题分析:(Ⅰ)对
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011340-65766.png)
的运用;
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011340-56053.png)
时,对
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011340-24509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011341-30511.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011341-34423.png)
的运用.
试题解析:(Ⅰ)原式=
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011342-41699.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011343-50702.png)
[
=
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011340-24769.png)
7分
(Ⅱ)原式=
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011343-15097.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011343-68649.png)
14分
考点:指数、对数的运算性质.
举一反三
【题文】已知
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011212-81969.png)
,则函数
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011212-19779.png)
的图象过定点
。
【题文】若方程
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011150-64597.png)
有解,则实数
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011150-30283.png)
的取值范围是
。
【题文】(8分)计算:
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011056-81402.png)
;
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011057-27102.png)
;
(3)已知
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011057-50301.png)
,求
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011058-73791.png)
的值。
【题文】函数
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011019-35275.png)
(其中
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011019-72403.png)
)的图象如下面右图所示,则函数
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011019-32616.png)
的图象是( )
![](http://img.shitiku.com.cn/uploads/allimg/20200328/20200328011020-88409.png)
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