已知定义在R上的偶函数f(x),其导函数为f'(x).当x≥0时,恒有xf'(x)+f(﹣x)≥0,若g(x)=xf(x),则不等式g(x)<g(1﹣2x)的解集为( )
A.![]() | B.![]() |
C.(1,+∞) | D.![]() |
更新时间:2020-03-21 20:11:35
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【推荐1】已知函数
满足
,且对任意的
,都有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96b8f760bc732836c28761d8636ae06.png)
,则满足不等式
的
的取值范围是( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1db6c94b94afc372212a81cc1f4dd9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96b8f760bc732836c28761d8636ae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fccb0d053b7a1a7941b5cb6c3a8d0d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96911bbe23e142002a481c15d8620e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】若函数
=
,x∈[﹣2,2]表示的曲线过原点,且在x=±1处的切线的斜率为﹣1,有以下命题:
(1)
的解析式为:
,x∈[﹣2,2]
(2)
的极值点有且仅有一个
(3)
的最大值与最小值之和等于零
其中假命题个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76595e1845bbdbe9c80f0b8c017e007.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c079d4b408e7e98267f077425da5d94.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
其中假命题个数为( )
A.0个 | B.1个 | C.2个 | D.3个 |
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【推荐1】已知
是函数
的导数,
,且
,则不等式
的解集是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e7a394c0580fa90e64695a1b270587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1243f9a9abcd2482460c9207ba9619f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3693ed951609e02aa476caf9e7349159.png)
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【推荐2】若
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6711e06cd61ac21656512e33f4ee2cd6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐3】设
是定义在R上的奇函数,
,当
时,有
恒成立,
则不等式
的解集是
![](https://img.xkw.com/dksih/QBM/2012/8/23/1570975839764480/1570975844892672/STEM/145f06026f2b4981af4a9728c03e0427.png)
![](https://img.xkw.com/dksih/QBM/2012/8/23/1570975839764480/1570975844892672/STEM/1224a8a39ea6439da5e59fdd977c16e7.png)
![](https://img.xkw.com/dksih/QBM/2012/8/23/1570975839764480/1570975844892672/STEM/8f3e3fde034b4449827a84dd09ac6c93.png)
![](https://img.xkw.com/dksih/QBM/2012/8/23/1570975839764480/1570975844892672/STEM/f916faa9bac048a79d41eeec743fbe0e.png)
则不等式
![](https://img.xkw.com/dksih/QBM/2012/8/23/1570975839764480/1570975844892672/STEM/2edbc1608f8344248b0925f7a23f8a82.png)
A.(![]() ![]() ![]() ![]() | B.(![]() ![]() ![]() ![]() |
C.(![]() ![]() ![]() ![]() | D.(![]() ![]() ![]() ![]() |
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【推荐1】已知函数
是定义在
上的偶函数,当
时,
,则不等式
的解集为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921dbd0a94b4ec26335a4daeee975b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91704ffcd7b17ce190a7e889f600498.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】函数
,则不等式
的解集为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19d564c072685606e3af52251325cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe5cae609db86b7d1ec7fbe257d09d3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐3】已知偶函数
在区间
上单调递减,且
,则不等式
的解集为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96977a5415357a1b31b00b91b511f884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25323b9ea0c48b15cadf4ee916aed649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c79741ac1f7bc8aec26134aa96846bc6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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