已知定义在R上的函数
,且
为偶函数.
(1)解不等式
;
(2)设函数
,命题
,使
成立.是否存在实数
,使命题
为真命题?如果存在,求出实数
的取值范围;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd5e6cad472bfe062b2fa44825ba7a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fa1476cf3552b9ae91ef039b1c6c80.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94cc25a7cf28ed096549fbae97fce40a.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea75c146df483a2b7b028b4a4ffb3f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b6183a441fd232d2e6ced6c30aeb94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00284ef8927a250233cac770fd09006e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2024-01-12 11:25:26
|
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解答题-问答题
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解题方法
【推荐1】已知
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且
)是R上的奇函数,且
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(1)求
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(2)若不等式
对
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74110bc818c2f5a53d63451c5251eb9.png)
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(1)求
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(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22c98960460390c700f43e05b17e9870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eea4cae6014499d16c9a07b20a3bb07.png)
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【推荐2】已知函数
(其中
),函数
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(1)若
且函数
存在零点,求
的取值范围;
(2)若
是偶函数且函数
的图象与函数
的图象只有一个公共点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/612884567e24c71c06656f38d544768e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b97b295f88972ba1c7e3cefda0885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd05dc8a356cf5c33f6fd919917c7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d285a4c557fc9748105b62ccd94b7859.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83f18c00c3dd5147dc4ea8c281797231.png)
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e915b67f8f747698b8b46d37bc453667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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【推荐1】已知函数
且
.
(1)判断
的奇偶性并给出证明;
(2)若对于任意的
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恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9a03272cb8d8fb37896c6fda5f7d8f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fa1476cf3552b9ae91ef039b1c6c80.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1261e861efb873b6ad37010bb8aec33d.png)
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【推荐2】已知函数
.
(1)当
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(2)若定义在
上奇函数
满足
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(3)对于(2)中的
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在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f9e079d16cd4a7942c21de7880dc641.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3710bb5777521ca27daf5a3e049ee0b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若定义在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4919b9347ad5b2c4a65d20024c64e4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde272780b4ba07266b1de53235cc1ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2401f1358466ad761052b98564ae5873.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8715d69eba6fe55144b769fa15f06124.png)
(3)对于(2)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb9ac957cbf0fa9aa1e6146b922e758f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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【推荐1】已知函数
.
为实数,且
,记由所有
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(1)已知
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;
(2)对任意的
,
恒成立,求
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(3)若
,
,判断数集
中是否存在最大的项?若存在,求出最大项;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e544c7e810a9466fc40966858193e433.png)
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(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8670c910f1200a4affdaa1202a8477e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
(2)对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b2c3e62e43a5e4a9d0a865a720bcda4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9351efff43e9446744faa1ea599dfc1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60302649eb940748da818199e55da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97bb437f1b1904f3487c1df9caeac35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6b60565848b60b9c9369273e25b2bc.png)
(1)是否存在实数
使得
在区间
上恒成立,若存在,求出
的取值范围,若不存在,请说明理由;
(2)求函数
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上的零点个数(
为自然对数的底数).
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(1)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e297d4a627f5badcc6874dc124e21b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b4d774577b246e5c2e694f4bd6e383.png)
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【推荐3】已知函数
(
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(2)若函数
,对干任意
,总存在
,使得
成立,求m的取值范围.
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(1)判断并证明
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(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13d72ecb2079a44f1c396e1e1d64883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f985718530cae9003dd401c044ef3d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea691a4e1d803448203dd8ea7c2a48eb.png)
您最近一年使用:0次
解答题-问答题
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解题方法
【推荐1】已知函数
.
(1)当
时,若
对
恒成立,求实数
的取值范围;
(2)关于
的不等式
在
上有解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d158f19b112a5f2dee9f43c2b04ebfd.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dff6a4905dd0f521c566c2ae3ec6d14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9befdf4ca5cff743e13c6b878c93c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0eac2b31a19918895e5af2d316490e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
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【推荐2】(1)已知函数
.若关于
的不等式
有解,求实数
的取值范围.
(2)已知函数
,
,若存在
,对任意
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(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6146edc88c6c0c5679b25af75646b2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c230a4f0f764f7d8bb18f19657d52a8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8c626afbc95213849e8f122d9b1a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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