已知函数
,满足
,且当
时,都有
.
![](https://img.xkw.com/dksih/QBM/2022/4/8/2953625815310336/2954634376560640/STEM/cd663006-b6bb-45fe-b674-807c6769971c.png?resizew=177)
(1)求f(x)的解析式,并画出的图象![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
(2)利用图象讨论方程
实根情况.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e83b8486ebead82f415fba347acbc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eedabb7314674689763c25a0143cb75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://img.xkw.com/dksih/QBM/2022/4/8/2953625815310336/2954634376560640/STEM/cd663006-b6bb-45fe-b674-807c6769971c.png?resizew=177)
(1)求f(x)的解析式,并画出的图象
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
(2)利用图象讨论方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27d64ef97b7ba8001ae416b5e8c3f42c.png)
更新时间:2022-04-09 20:41:56
|
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】如图,
是边长为
的正三角形,记
位于直线
左侧的图形的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/d169a5ca-e992-400c-b023-39e99718152a.png?resizew=196)
(1)求函数
解析式:
(2)若
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,已知
,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/197ff205af4ab95051f79438fb14afba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/d169a5ca-e992-400c-b023-39e99718152a.png?resizew=196)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/197ff205af4ab95051f79438fb14afba.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958749be01568ca0485e3537e138697.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d61fa764dd343d2e97780a83afb7c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdc176569ec8d428788cda28f6cac07a.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】设
.
(1)求
的值;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9cd73a9659ca31d5c6cb22f5f21210.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52682d6bc2f5dc1e2fb37a96e5b22a4.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】已知函数
.
(1)若
,判断
的零点个数,并说明理由;
(2)记
,求证:对任意
,均有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d70101f1dba868225b3a85bee321ae5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586de1d4d9c0b8e5fced93d47d96c37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767455b03b6d5c30a99b81203aa79ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7dbb416ec1ff1984a724a4f48bf692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7af799440daf3f3c06665bcf5a1a74.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知函数
在定义域
上严格单调递增.
(1)证明:函数
至多存在一个零点.
(2)若函数
存在零点
,证明:存在
,使得
对于任意
恒成立的充分必要条件是
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a19bbab2270fc8e694527e801556cf.png)
(1)证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07cbf6c4e062852a2bdee01b9992713b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ad65ff0ab0a64844ab78062df2e6ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13747fa9a42164caebe2c9b7c5d06d3a.png)
您最近一年使用:0次