2024高三·全国·专题练习
1 . 十七世纪法国数学家、被誉为业余数学家之王的皮埃尔・德・费马提出的一个著名的几何问题:“已知一个三角形,求作一点,使其与这个三角形的三个顶点的距离之和最小”,意大利数学家托里拆利给出了解答,当
的三个内角均小于
时,使得
的点
即为费马点;当
有一个内角大于或等于
时,最大内角的顶点为费马点.已知
,
,
分别是
三个内角
,
,
的对边,且
,若点
为
的费马点,
,则实数
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解题方法
2 . 在
中,角
所对的边分别为
.若
,且边
上的中线
长为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b05e85a0a24292779fa5e5e37358ee28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa9afeb51c4f3b08fea4641d3ce364b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734281a7115f8eaf345e2587f774bbec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
A.![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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3 . 在圆台
中,圆
的半径是2,母线
,圆
是
的外接圆,
,
,则三棱锥体积最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2899e607479d8d1c47d954ae9ebb7144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
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4 . 若直线
与
交于
,
两点,则
面积的最大值为_________ ,写出满足“
面积最大”的
的一个值________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/816d1f63b737faba12ab856d7e5dc885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8159f28f6c287fb3479678d6e1424217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解题方法
5 . 设
,
,且
,则下列结论正确的个数为( )
①
②
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9872546d1d86a7f0b1c48a9ed42e47bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e96edcafa0bc98a4e9bcc00d71cb91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d6739dddbc2978a79779bc7f8bf88c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9872546d1d86a7f0b1c48a9ed42e47bd.png)
A.0 | B.1 | C.2 | D.3 |
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6 . 设
,则
的最大值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a521891098b625f372ff648d110afe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d61b2953ddf211685e32116d834a9f9.png)
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4卷引用:河北省秦皇岛市青龙满族自治县第一中学2024届高三下学期5月模拟考试数学试题
名校
解题方法
7 . 设
,
,且
,则下列结论正确的个数为( )
①
②
③
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc922d69c77fabba2c19e47f3e779100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e96edcafa0bc98a4e9bcc00d71cb91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d6739dddbc2978a79779bc7f8bf88c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9872546d1d86a7f0b1c48a9ed42e47bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc922d69c77fabba2c19e47f3e779100.png)
A.1 | B.2 | C.3 | D.4 |
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解题方法
8 . 若实数
,
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd989ddfbed4a6aa18ea57734522153.png)
________ .
![](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/99137cb98f861f53439fb56196610f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd989ddfbed4a6aa18ea57734522153.png)
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9 . 已知方程
,下面四个命题是真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/608e3b6e18246d45521a240b5bfc5009.png)
A.当![]() |
B.当![]() ![]() |
C.当![]() |
D.当![]() ![]() |
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10 . 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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