解题方法
1 . 若
,椭圆
与双曲线
的离心率分别为
,
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce64fa0d35183e9cea4b93bef8b53fe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a2c39732beed1dbcede283901b55c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4760ac9dfcdef7fe0a3dfe1e75b96ddb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33558881906c228c262ff8024dcfc4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33a99190a8fd29c36d5a002e3197cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64478547eef44fbcea5a4a6038d3dc9e.png)
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2 . 已知离散型随机变量
服从二项分布
且
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870528aa6be6f56bae0eb6b10a765c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/effd25869cf20bc44672166f6dc5948b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9803230c689be05892258f5663b66938.png)
A.2 | B.![]() | C.![]() | D.![]() |
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解题方法
3 . (1)已知
,求证:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6a93645a9c1f5a2961519d74bf51567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22bbb6c88cb559f76a89daa17f7084c.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b3e2dc4e933c2bb7a1cb19cee8d0ad7.png)
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解题方法
4 . 在
中,已知
,
,
为
的中点,则线段
长度的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1466856bf2570685d3629c1f813748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
A.3 | B.![]() | C.2 | D.![]() |
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5 . 设
,
,
.若
,
,则
最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/788aae9a4a76cfe31bdbd599f477f944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731bdc8d2686a05f12a2ba8a7e3b01be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e174b2cc64d59325e30cea8301f813b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0d463a037f21d43ce9fb879a226923.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f0b84ee4ed90face0993d4f4dda379.png)
A.2 | B.![]() | C.1 | D.![]() |
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6 . 已知抛物线
,过抛物线
焦点的直线交抛物线
于
两点,交圆
于
两点,其中
位于第一象限,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7ad3432ac96b0a38beaa7f2edc3499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/583703e23366d09b9ac74c9e51abe587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b2cceff3976c7c0ed4f4cbda4165b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/660d5058261473b6ccb81f229f640da6.png)
A.2 | B.3 | C.4 | D.5 |
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7 . 下列命题为真命题的有( )
A.若![]() ![]() |
B.不等式![]() ![]() |
C.已知实数a,b满足![]() ![]() |
D.若关于x的不等式![]() ![]() ![]() |
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解题方法
8 .
的重心为O,过点O的直线与AB,BC所在直线交于点E,F,若
,
(
),则xy的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7bd496f87c3448dde473c858fd235bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b2f8ae367b25e30569ab0e75ddd54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7da355f2dc4b6759ec064419e53c51.png)
A.![]() | B.![]() | C.![]() | D.4 |
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解题方法
9 . 对于
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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10 . 若正数
,
满足
,则
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/38e7846eec13f0d15c3f3da5e9aa6852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7bf9200b351a259ddfc6c0266129d.png)
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