题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153520-89002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153521-48867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153520-89002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153521-56842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153521-55281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153521-98692.png)
(Ⅰ)设每月用电
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-59182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-41370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-41370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-59182.png)
(Ⅱ)已知小王家第一季度缴费情况如下:
月份 | 1 | 2 | 3 | 合计 |
缴费金额 | 87元 | 62元 | 45元8角 | 194元8角 |
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-41370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-59182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-67138.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-72708.png)
解析
试题分析:(Ⅰ)依次列出每个区间断的函数式,重点考查分段函数 分段函数是是一种重要的函数形式,是考查多个知识点的良好函数载体。所以在平时的学习中,熟悉分段函数的表示形式以及常见题型和解法,是十分必要的 (Ⅱ)考查的是分段函数求解不等式,需要注意对范围的分类讨论
试题解析:(Ⅰ)依题意,当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-56075.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153523-59119.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153523-53342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153523-88202.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153523-11300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153524-62515.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153524-70165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-41370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-59182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-67138.png)
(Ⅱ)小王家一月份缴费
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153524-90390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153524-64280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153525-10136.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153525-82829.png)
二月份缴费
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153525-54013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153525-53675.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153525-54013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153526-50792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153526-55988.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153526-75859.png)
三月份缴费
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153526-32249.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153526-68920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153527-33409.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153527-46733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153527-58301.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153524-70165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153522-72708.png)
核心考点
试题【某市电力公司在电力供不应求时期,为了居民节约用电,采用“阶梯电价”方法计算电价,每月用电不超过度时,按每度元计费,每月用电超过度时,超过部分按每度元计费,每月用】;主要考察你对函数的相关概念等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153234-11560.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153147-60081.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153129-43856.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153129-81511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153113-28322.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153113-28322.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153113-29989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153113-60020.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153114-35434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153114-57003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153113-29989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153114-99794.jpg)
(Ⅰ)设
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153114-35434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153114-30975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153113-29989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153115-67933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153115-67933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153114-30975.png)
(Ⅱ)当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153114-35434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153113-29989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153051-11515.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153051-11460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153052-87808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153052-40418.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153052-84601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153052-63979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153053-30401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153053-12813.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153052-63979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153053-30401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153053-79113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153053-88897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153053-60122.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153051-11515.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204153054-59582.jpg)
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