解题方法
1 . 如图,某加工厂要在一圆柱体材料中打磨出一个直三棱柱模具,已知该圆柱底面圆面积为
,高为6,则能截得直三棱柱体积最大为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/c846ad8e-1587-4e89-892a-558d9b68d2c7.png?resizew=120)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a39dce3f1e36dbe01293c309816968.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/c846ad8e-1587-4e89-892a-558d9b68d2c7.png?resizew=120)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-07-28更新
|
579次组卷
|
4卷引用:辽宁省鞍山市2022-2023学年高三上学期第一次质量监测数学试题
辽宁省鞍山市2022-2023学年高三上学期第一次质量监测数学试题贵州省遵义市2021-2022学年高二下学期期末质量监测数学(理)试题贵州省遵义市2021-2022学年高二下学期期末质量监测数学(文)试题(已下线)考向26空间几何体的表面积与体积(重点)-2
名校
2 . 已知
,
,
为一个三角形的三边长.证明:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/227120dd656502adb6f4ebd80ce8096f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e62132a01a439422c794670c1f8ed11.png)
您最近一年使用:0次
2019-12-13更新
|
1513次组卷
|
5卷引用:2020届辽宁省辽河油田第二高级中学高三4月模拟考试数学(理)试题
3 . 选修4-5:不等式选讲
设实数
满足
.
(1)若
,求
的取值范围;
(2)若
,且
,求
的最大值.
设实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/346171d0a0460e5b6627ca462da71402.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85cf3a99ecede8fbd111e1c58a1387f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf04fe8895c10624636a815d3d752975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/457f50c774979f8b3057303e150fa188.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
您最近一年使用:0次
2016-12-03更新
|
296次组卷
|
3卷引用:2014届辽宁省实验中学高考前最后模拟理科数学试卷
真题
4 . 选修4-5:不等式选讲已知
均为正数,证明:
,并确定
为何值时,等号成立.
![](https://img.xkw.com/dksih/QBM/2010/6/25/1569771375550464/1569771380850688/STEM/44e35709cb794af1a69ebc5f7b7077dc.png)
![](https://img.xkw.com/dksih/QBM/2010/6/25/1569771375550464/1569771380850688/STEM/f9703e89f1f14eeb89331e2f48879dca.png)
![](https://img.xkw.com/dksih/QBM/2010/6/25/1569771375550464/1569771380850688/STEM/44e35709cb794af1a69ebc5f7b7077dc.png)
您最近一年使用:0次