名校
解题方法
1 . 环保生活,低碳出行,电动汽车正成为人们购车的热门选择.某型号的电动汽车在国道上进行测试,国道限速80
.经多次测试得到该汽车每小时耗电量M(单位:
)与速度v(单位:
)的数据如下表所示:
为了描述国道上该汽车每小时耗电量M与速度v的关系,现有以下三种函数模型供选择:
①
;②
;③
.
(1)当
时,请选出你认为最符合表格中所列数据的函数模型(需说明理由),并求出相应的函数解析式;
(2)现有一辆同型号电动汽车从A地行驶到B地,其中高速上行驶200
,国道上行驶40
,若高速路上该汽车每小时耗电量N(单位:
)与速度v(单位:
)的关系满足
(
),则如何行驶才能使得总耗电量最少,最少为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ca55c030e7d88040525c4fb9a278f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7759b26a9a0741248bf2bb87ebd01dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ca55c030e7d88040525c4fb9a278f8.png)
v | 0 | 10 | 30 | 70 |
M | 0 | 1150 | 2250 | 8050 |
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392d95e6d94b83ae4184779fb880c8c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f118189a53a2df7bef5db60246bf3724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67f6c9d33438af7d285eb22a41ee2896.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90532edd1cda3222456fe3b3b93c4c2f.png)
(2)现有一辆同型号电动汽车从A地行驶到B地,其中高速上行驶200
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fe30c67ac20cd4e8b9cc2d0d420a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fe30c67ac20cd4e8b9cc2d0d420a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7759b26a9a0741248bf2bb87ebd01dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ca55c030e7d88040525c4fb9a278f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cb6181197c692c265bac53b1c522930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af133185a405e3646f6845100c6e6e2d.png)
您最近一年使用:0次
2022-08-13更新
|
222次组卷
|
2卷引用:辽宁省营口市2021-2022学年高二下学期期末数学试题
名校
2 . 已知二次函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b418ba4ab8c76e2ef62a1dc2a76643e.png)
(1)若函数
是偶函数,求实数
的取值范围;
(2)若函数
且任意
都有
恒成立,求实数
的取值范围;
(3)若
,求
在
上的最小值
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b418ba4ab8c76e2ef62a1dc2a76643e.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2733e882dda0df3e676aa53233abd9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f63832f3419d4d71e393808c3f1a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a2c01ac2a7f6ad7e03cb7a61daefab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a25199681040c58af769a92b7763ff6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f786a5701dc1a8a015e8843c3360151b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1591d4244dcf5539a4ae98f554e91e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9317cb763ff70bd19b2950e7f3f74399.png)
您最近一年使用:0次
2019-01-11更新
|
323次组卷
|
2卷引用:辽宁省营口市开发区第一高级中学2017-2018学年高二下学期第二次月考数学(文)试题