下列不等式成立的是( )
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-11-08 10:33:39
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解题方法
【推荐1】已知
,
,下列命题中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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【推荐2】对定义在
上并且同时满足以下两个条件的函数
称为
函数:①对
恒有
;②当
,
,
时,总有
成立,则下列函数是
函数的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320bf041dfca93ddb16e14356f9fdc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8c2c41544128e26e2bcf7823515a01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12aae852c3129efc16934aefc54201f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cd2fe62ffe3caa1c6f7976851c9dc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2f51cd760aeff9365b51e9a85b41e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27928aa83370ffb7e137019ff03c3e58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
【推荐1】已知定义域为
的函数
满足
,当
时,
.则下列结论不正确的是( ).
![](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/48dc6d0827a159050e3fa55164f258b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc784485886123c08fe0d0c90a3e4bf4.png)
A.若关于x的函![]() ![]() ![]() |
B.函数![]() |
C.当![]() ![]() |
D.![]() ![]() |
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【推荐2】已知函数
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77e13a044328765cea64b88b55697d5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffa28c7f519c1c85c0a3cad23b2e6cb.png)
A.![]() |
B.![]() |
C.直线![]() ![]() |
D.当直线![]() ![]() ![]() ![]() |
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【推荐3】已知函数
,直线
:
,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0c0fb7d7810f3f95415e61621d07a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b82c7fc649b5851712800b86ad4459.png)
A.![]() |
B.若![]() ![]() |
C.若有且仅有2个整数![]() ![]() ![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() |
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