解题方法
1 . 正实数
,
满足
,则使得
恒成立的整数
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61137eb4ce8916a7e0ce28c5e122a50c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98f15169afe0a00d9aeefd8cdba841da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.5 | B.4 | C.3 | D.2 |
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解题方法
2 . 已知函数
,若
,且
恒成立,则a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cddd44338754d97b15bd202fab6134d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/161bd1b02fbad8a6f285c5ab007b5333.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f966243d825cae7a142da7738d54f536.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
3 . 下列选项中说法正确的是( )
A.函数![]() ![]() |
B.一四面体不是正四面体,那该四面体最多有3个面全等 |
C.![]() ![]() ![]() ![]() ![]() ![]() |
D.![]() ![]() |
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解题方法
4 . 已知
、
,若
恒成立,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8aff513578c7ff5843fb3363f8c078.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5405c7e01c49ce8bf2a16ff8ab073af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
5 . 已知
,
且
,若
恒成立,则实数
的取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f396c5ec8013468c9de9b2cd6f2f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bfdfadd161d7650ca534f90d248a6ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2021-12-15更新
|
846次组卷
|
2卷引用:黑龙江省实验中学2021-2022学年高三上学期第五次月考数学(文科)试题
解题方法
6 . 若对任意
恒成立,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc670b67a5740568c3effc14723ffbdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 已知函数
.
(1)当
时,求函数
的值域;
(2)若对任意的
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bb1f4e52f0c9fdac952a7b8977ef26.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f596951475ca6784cf3e16b45c89782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4110021b639bbee49325d667447722f.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f596951475ca6784cf3e16b45c89782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29978eb55b3ef41ef8f6b603cddd3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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名校
解题方法
8 . 已知对任意正实数
,
,恒有
,则实数
的最小值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cce28b1e1e8e2155d8f53a571d03872.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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9 . 已知
,命题
不等式
的解集为
;命题
是定义在
上的减函数.若“
且
”为假命题,“
或
”为真命题,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce494a87450c08b7f69d5ec63e4ffea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933093b52cca887f597cbe22a5467b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a810213943a8d17b3a6eda78aece6fbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2021-10-21更新
|
194次组卷
|
2卷引用:河南省大联考2021-2022学年上学期高中毕业班阶段性测试(二)理科数学试题
名校
解题方法
10 . 若
,
,且
,则
恒成立的实数
的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219e50333d30efad42e31cb9a225846e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4426240f4275b266fe428e885f990203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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