已知函数
是R上的减函数,则
的取值范围是____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005f9523b936c3362171dee3d402ade9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2018-11-18 20:06:49
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相似题推荐
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适中
(0.65)
解题方法
【推荐1】已知定义在
上的偶函数
满足
,且当
时,
,则函数
的零点个数是_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d4529b9772bc752f353c2c3a1e1387d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a04587a70fdf433d58360f36ed1eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d3658447a6722eae44592978c20635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2acbd7c0d525e2e1d78f0e5d04b0c73.png)
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适中
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【推荐2】已知函数
,若关于
的方程
有四个根
,
,
,
,则这四个根之和
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c6170ec2d68afa5d41ad6a60af532b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c342d52fc26cc550a45b80756903bee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365b38a7689a8eede6820cd6f1fe952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2741ca619df1d9ab3d9ced4c49142dc.png)
您最近一年使用:0次
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名校
解题方法
【推荐1】函数
是定义在
上的单调函数,且对定义域内的任意
,均有
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579c066c33f4b3d368a3d5c33e5fbf60.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e64ba8593537d13752713ecc882cd5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19e8c56f42a89a261e53e3d209f192e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579c066c33f4b3d368a3d5c33e5fbf60.png)
您最近一年使用:0次
填空题-单空题
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适中
(0.65)
【推荐2】已知定义在
上的函数
在
上是减函数,且
是偶函数,则关于
的不等式
的解集为______________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d8fcaef916db4b90e9ce3054974759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b727eb9da56be079445321cf61cf26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb73fe37a7d0b4c0fc4198715ab1c524.png)
您最近一年使用:0次
填空题-单空题
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适中
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解题方法
【推荐1】已知定义在
上的函数
同时满足下列三个条件:
①
为奇函数;②当
时,
,③当
时,
.
则函数
的零点的个数为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966d9dd819cba29980da3700422c2497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d1f6f459292de1002f863203ce91a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e2c691d0c48afd0ce87fd1b58ce876b.png)
则函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fdcf47319f3286dc149ad00d96a627.png)
您最近一年使用:0次
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名校
【推荐2】函数
的定义域为
,当
时,
且
,若函数
有四个不同的零点,则实数
的取值范围为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb788ae88e457017bb81120b6a2e5ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a7bbf4bae989fdc308de64783bb145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1706a428d7240f13f9ab3621cb720bc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c19e3bd91c50b8f1dec22937295d05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1348a4e70b7941a5428340be5317e3f5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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