名校
1 . 天文学中常用“星等”来衡量天空中星体的明亮程度,一个望远镜能看到的最暗的天体星等称为这个望远镜的“极限星等”.在一定条件下,望远镜的极限星等M与其口径D(即物镜的直径,单位:mm)近似满足关系式
,例如:
口径的望远镜的极限星等约为10.3.则
口径的望远镜的极限星等约为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/1eed6d60-daac-4f2e-9eaa-49782b9d9009.png?resizew=208)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bdf82f3a68c6bb07042ef4bda94de58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f40ac9e8d454e09fd556e05263c83468.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481532dca39931940700dc90bab522bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/1eed6d60-daac-4f2e-9eaa-49782b9d9009.png?resizew=208)
A.12.8 | B.13.3 | C.13.8 | D.14.3 |
您最近一年使用:0次
2023-01-19更新
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424次组卷
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2卷引用:海南省2023届高三上学期期末学业水平诊断数学试题
14-15高一上·湖北·期中
解题方法
2 . 设
和
是定义在同一个区间
上的两个函数,若函数
在
上有两个不同的零点,则称
和
在
上是“关联函数”,区间
称为“关联区间”.若
与
在
上是“关联函数”,则
的取值范围是
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/55d50f9043bc4d1282d9172f09057e2a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/f7832ab3b9dd477bb92c92a699a7936a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/2aa27f21713b43d8abc157530503590e.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/8e864b933fc34d68af4a8580623830b2.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/d89e13a3fa8143169cd71a7c552f04c5.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/55d50f9043bc4d1282d9172f09057e2a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/f7832ab3b9dd477bb92c92a699a7936a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/2aa27f21713b43d8abc157530503590e.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/2aa27f21713b43d8abc157530503590e.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/2c77d0ce527042268fb589daf2d618f3.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/f4715dd06f33493aa885fd3f27a3aaa3.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/1300f0d3913a40b0b1260179dc9984e1.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/08ea8633893d4221b2eb36b3e55da194.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-03更新
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383次组卷
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3卷引用:2016届海南省文昌中学高三上学期期末考试理科数学试卷