解题方法
1 . 一个顶点为
、底面中心为
的圆锥体积为1,若正四棱锥
内接于该圆锥,平面
与该圆锥底面平行,
这4个点都在圆锥的侧面上,则正四棱锥
的体积的最大值是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a5faf3cbb633fc4294c8ce703c64c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a5faf3cbb633fc4294c8ce703c64c3.png)
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2 . 设A在曲线
上,B在直线
上,O为坐标原点,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4addacfadd6fac93f7323ce91e12005e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d6e08526a91f8dfd160e7da2f92a3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a704469569b68ee11ab166dba3f686f0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 设正实数
满足
,则
最大值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21aea4b9cdf4b1c51f1e770e74370b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b80dfb28a5c41cfdd9d2a43465ced0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c888074323d7e57f80ad31235e4840d.png)
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4 . 设m为正整数,且
,求所有的实数组
,使得
,对所有
成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03911e9977b919fc80456105df934ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe1c31a81f198c443e71b83ca662939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20aa97f3d4fa393338cda3e4a89d1633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b0e3b00fe47801afb53ec56706c21a.png)
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5 . 已知正实数
满足
,则
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21aea4b9cdf4b1c51f1e770e74370b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f560f01fd966becba43e5c1baf6062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdfc58fb5609724783d8e9ec311378c.png)
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6 . 设函数
有三个正零点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d88b7f6d67f01ded5a5feec00be1bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd9ea2381fdc5959e7d765b453bfe12.png)
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7 . 实数a、b满足
,则
的最大值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04959523a28786962d51cfb43a8767d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee9a91d646136a91f5b5621d23b19b8.png)
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解题方法
8 . 已知圆
与
轴相交于
两点,抛物线
与圆
相交于
两不同的点,则梯形
面积的最大值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560adea7b0d4fbe4131fc41f3fcbd871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97afdeaa1d4433cffe5005446fcbbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c29a7e8eea08197bf53164a560bee58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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9 . 已知正实数a、b、c满足
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f9a67d0c6387f646e9041cc37ef63d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a4491efe17eb84a30ebdcff8bec845.png)
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解题方法
10 . 设非负实数
,
,
,证明:
.
![](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/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2046bf4297cc13491ec10c59a35b2f75.png)
您最近一年使用:0次