名校
1 . 设
,
,则下列说法正确的是______ .
①
;
②若
在定义域内单调,则
;
③若
,则
恒成立;
④若
,则
的所有零点之和为0.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a2c45c44ead1093322f8b38160a0bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104375baf5cef5eb92cfc7cf13b80193.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f5f7a36e251bbc424ccc127ebb2881.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de1c7a0f3adc1095171baf48338c8e8e.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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解题方法
2 . 对任意
,当
时,
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd23c46bca8cdd9c8c06711a697b07f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d01616e60a7aef4a1f92abb62b53553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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名校
3 . 已知当
时,不等式
有解,则实数
的取值范围是______ ;根据前面不等式,当
时,满足
恒成立,则实数
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0aa2ef928b6e3341d0a0dc6d8055b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c21ed2dfd738102b53e94c689e4ac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df138b2319e758d5611be9c2b54c914c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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名校
解题方法
4 . 已知函数
,
,有以下四个命题:①曲线
在
处的切线方程为
;②
是函数
的极值点;③对
,不等式
恒成立;④
.
其中正确的命题有______ .(将正确的序号都写上,多写漏写均不得分)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d71f56ef6906bc37ca312051d97d4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac200a9106723cd0d4749339ea677e5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebbb2eab12b76127cc87304c212cdd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74195937f9148599c822b424b0f4c0d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c3319647314c3b6d82958a909acd2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6422b9c2e93a91fe9e39ce4d9dabb0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25316e8ea43ba5a1d05b75cf42838b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0611d056ae5c64f7e5026e8c1628d8b1.png)
其中正确的命题有
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名校
解题方法
5 . A,B为平面上两定点,
(
,且
),点集
,若
,
,且对任意
,不等式
恒成立,则实数m的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b37412082542969168fe1b28fc59b4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a369ce3949b2bd2747a48054f7b951c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c699c7fefbcc48aa588ab8a87f94a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb514b76b680000adb4581a15c4aef33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682cbe4cd0d5cf5beb79d3ab89a117f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e51975ccf54db0f9472a605e3a1832.png)
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名校
6 . 设函数
,设
的最小值为M,若
至少有一个零点
,且命题
成立,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c62698df7f54c7a16972b01d0d4cb253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4d8e8a98b185c7e40374a49a2fbf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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