已知函数
是偶函数.当
时,
过点
.
(1)求实数a的值;
(2)求函数
的解析式;
(3)求不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74088e31acd9bc94dc8bc34e616bef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/631386549c0cec5981a1da47b05e5d25.png)
(1)求实数a的值;
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c2e0bb6d63b7bcaee92a470d58cc399.png)
更新时间:2023-02-18 06:46:06
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解答题-作图题
|
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解题方法
【推荐1】已如定义在
上的奇函数
,当
时,
.
![](https://img.xkw.com/dksih/QBM/2022/11/12/3107884529844224/3108305447821312/STEM/e13ddb593bdf48fc9bae3cd79247d178.png?resizew=261)
(1)求函数
在
上的解析式,并作出函数的大致简图;
(作图要求,①列表描点;②先用铅笔作出图象,再用黑色签字笔将图象描黑);
(2)并根据图象写出函数单调区间(不用证明);
(3)若不等式
在
上有解,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8ed92f58d44ee590c425bc741195c1.png)
![](https://img.xkw.com/dksih/QBM/2022/11/12/3107884529844224/3108305447821312/STEM/e13ddb593bdf48fc9bae3cd79247d178.png?resizew=261)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
(作图要求,①列表描点;②先用铅笔作出图象,再用黑色签字笔将图象描黑);
(2)并根据图象写出函数单调区间(不用证明);
(3)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f575653aa7f0cb58265b20a2b36786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ac6a2f7366e0190592444bb60d3cea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】已知定义域为
的函数
是奇函数.
(1)求
的值;
(2)判断
在
上的单调性,并说明理由;
(3)若对任意的
,不等式
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b172f4015422c154a6c6183b2c936ef.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ffa257f460e4ac09d2c68954d5c824d.png)
(3)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995ec593baa4ef50b6d87c78380953d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c147912d6afbf3ec3d1576198bb2bc.png)
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【推荐1】已知
且
的图象过点
.
(1)求
的值:
(2)若函数
,求
的定义域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10241873be6065e90fa9e38a168ca89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fa1476cf3552b9ae91ef039b1c6c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e7d192c1c988462b773b36fe0bc169.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25288d280d904952dc22a4484604014e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
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【推荐2】已知对数函数
(
且
).
(1)若对数函数
的图像经过点
,求
的值;
(2)若对数函数
在区间
上的最大值比最小值大2,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e349f49908801a73999320f7a49820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(1)若对数函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cbd2b8f2572cf6a285d0cab9cc16da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若对数函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ce23fd1d866c3a711875b7c5a1c13c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】已知函数
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(1)若
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(2)已知函数
存在反函数,其反函数记为
.若关于
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在
上恒成立,求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b9e5717be98f70b11e8d712d3e6d396.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135bcf6d7f7c04641823b90f1d038eee.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ddd1b55859b970f0e9197d19f5d7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b916c6d3fb2fdc67421489f207c93903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】已知函数
,
.
(1)当
时,求不等式
的解集;
(2)若不等式
的解集包含
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e1c2abc2c7ade78e5fdf1de5c3b313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb7ba07c8ca023618f762c5f1bb239e2.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78368e466f284f6b89abe12f32562d9a.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447d6f62c09c1d05346fd16a24159f6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417ab20883d799aaf311371393fa7d7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】已知
函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f1251944df1ff015562a10d667e8c8.png)
(1)当
时,解不等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee707bd9a98d7e3fbcaf3a47595c7ebd.png)
(2)若关于
的方程
的解集中恰好有一个元素,求
的取值范围;
(3)设
若对任意
函数
在区间
上的最大值与最小值的差不超过1,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf86c02fc2d3fcf7881e6fed3df9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f1251944df1ff015562a10d667e8c8.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee707bd9a98d7e3fbcaf3a47595c7ebd.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb84b8dccc15c156e42ec76cd00fe42f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/263adb79cbd72164cc1468a37cb67eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad519b3f5c90172d9ba4d7c7c7c2b93.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb0381514dc997c3802b84868805cbf.png)
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解答题-作图题
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解题方法
【推荐2】在密闭培养环境中,某类细菌的繁殖在初期会较快,随着单位体积内细菌数量的增加,繁殖速度又会减慢.在一次实验中,检测到这类细菌在培养皿中的数量
(单位:百万个)与培养时间
(单位:小时)的关系为:
根据表格中的数据画出散点图如下:
①
,②
,③
.
(1)选出你认为最符合实际的函数模型,并说明理由;
(2)利用
和
这两组数据求出你选择的函数模型的解析式,并预测从第2小时开始,至少再经过多少个小时,细菌数量达到6百万个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![]() | 2 | 3 | 4 | 5 | 6 | 8 |
![]() | ![]() | ![]() | 4 | ![]() | ![]() | ![]() |
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2ffa340bef9f6f3c604cab719c60d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb9ad466c2dcbbe064bad2828ea0ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb933c19ee6f901a189a33345d816c57.png)
(1)选出你认为最符合实际的函数模型,并说明理由;
(2)利用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bb7ff5012ac35f2e5fa64b0247ce93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9094bcc858b1ebeb0c5a285ca491d139.png)
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【推荐3】已知实数a满足
,
.
(1)求实数a的取值范围;
(2)若
,
,且
,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/618ddbf4f91ffd36c5cedede3802e8d5.png)
(1)求实数a的取值范围;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd0d5ef0170d4d4dc056eed669807ef.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe653ed86488f8dcdf2612ac544fe2aa.png)
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