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解题方法
1 . 以下四个命题表述正确的是( )
A.若直线l的斜率为![]() ![]() |
B.三棱锥![]() ![]() ![]() ![]() ![]() ![]() |
C.若直线l过点![]() ![]() |
D.在四面体![]() ![]() ![]() |
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2 . 如图,已知圆柱
,点A是圆
上的动点,
,
,
、
为圆
上的两个定点,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/3b204528-9ad1-4b99-8baa-1c9e6477b438.png?resizew=130)
(1)当
或
时,求证:
平面
;
(2)当直线
与平面
所成角的正弦值取最大值时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c72548747de9224e0d6aed3c2848ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d94af9daa9f53da6cdfdd87bb82e00ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187c4fdbdcafe2dd605005adecbb34dc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/3b204528-9ad1-4b99-8baa-1c9e6477b438.png?resizew=130)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da779357ea1216a88867f5f862d1681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca5dcc6a2592926c0156077c949a7b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19800e8d507383540775c1914485b9ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc34f9aacc7d370e20d7dabbbc5b3eb.png)
(2)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc34f9aacc7d370e20d7dabbbc5b3eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27c2d124f3ab03d815a52118aa984a79.png)
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3 . 已知水的密度为
,冰的密度为
,一水平放置的圆柱形桶内有一个半径为
的冰球,待冰球完全融化后测得桶内水面高为
,则桶的底面半径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cc1ed00a36d407a65da250c5e29e2de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f4e1cf14d809dd5e1e129d210b5b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5850a22a6d1b34c518a58feea824de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74d2dfdcbe7861144b53422f96affa92.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-07-18更新
|
261次组卷
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3卷引用:安徽省2020-2021学年高一下学期期中数学试题
4 . 已知所有棱长均相等的三棱锥
的体积为
,把该三棱锥分别截去以
为一个顶点的四个小正三棱锥
如图所示
,使得剩余的几何体的所有棱长均相等,则剩余几何体的体积为
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/a170752d-0b4a-44ae-8138-d10546bb2cf9.png?resizew=313)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2740d2f1f18082f6299bd23e0be289c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce08128582a7e855852c03e0ac5d0487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8c94316312f093ebfc80b872a83c25.png)
![](https://img.xkw.com/dksih/QBM/2022/12/6/3124841894461440/3125297948672000/STEM/c233872f614846eb98c76d039b191c71.png?resizew=4)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/a170752d-0b4a-44ae-8138-d10546bb2cf9.png?resizew=313)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 如图所示的后母戊鼎是一件非常有名的青铜重器,是商王武丁之子祭祀母亲戊所铸,现藏于国家博物馆.鼎身与四足为整体铸造,鼎耳则是在鼎身铸成之后再浇铸而成,鼎身大致为长方体形状的容器,长为
,宽为
,壁厚
.若一堆祭祀物品在该容器内燃烧后形成的灰平铺且铺满容器底部,灰的高度为
,则灰的体积为________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772db6f7b4a6eb0284737a99f081ac3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6eb4c8351058a9feb8386e8f76d543f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed0c23da3570f7f3e0b32f531348f9af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569419e413d98eb8e22052bd553db80b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc17f54e5045eb586f36b86467738a9.png)
![](https://img.xkw.com/dksih/QBM/2021/4/26/2708289356603392/2761285050105856/STEM/b3551c91d94f4cc283d12c8988e9683d.png?resizew=117)
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2021-07-10更新
|
220次组卷
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2卷引用:安徽省2020-2021学年高一下学期期中数学试题
名校
6 . 漏斗作为中国传统器具而存在于日常生活之中,某漏斗
有盖
的三视图如图所示,其中俯视图为正方形,则该漏斗的容积为
不考虑漏斗的厚度
______ ,若该漏斗存在外接球,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7277696e8d9f58c9ec28887783b317e8.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7277696e8d9f58c9ec28887783b317e8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/1b9d9896-ad71-41a5-a6c1-b7164e1143af.png?resizew=220)
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2022-01-28更新
|
130次组卷
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5卷引用:安徽省皖淮市级知名高中2022届高三上学期12月联考理科数学试题
7 . 已知一个水平放置的棱长为
的正方体的无盖盒子,里面装有若干水(不满),在上面放一个倒置的圆锥体,圆锥的轴截面是腰长为
的等腰直角三角形.若水恰好不溢出,则原来正方体中水的深度估计为( )
(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f13a78a5feb056770750c6a0ebebdd2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-11-25更新
|
186次组卷
|
2卷引用:安徽省六安市舒城中学2021-2022学年高二上学期第四次月考数学试题
解题方法
8 . 已知函数
.
(1)若
,证明:函数
有且仅有两个不同的零点;
(2)在(1)的条件下,设这两个零点分别为
.
(i)证明:
;
(ii)将以
为顶点的四边形
绕
轴旋转一周得到一个几何体,求该几何体体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4550072cd13e511a02246496caecc.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0134a46f2f76b924127cb46ac939e322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7eb1c785d537dfa63a7427123ebf69.png)
(2)在(1)的条件下,设这两个零点分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/694c99143dcd6fdc8138efa03d0c3350.png)
(i)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f099f2a4f62930bebb7cc7597d9811e.png)
(ii)将以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1a41250a40e8557e43a7fc96afca04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ffb694021b52653de5141ae27ba6d0.png)
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9 . 长,宽,高分别为6cm,8cm,10cm的长方体水槽置于水平桌面上,该水槽内装在高度为8cm的水,若将一半径为3cm的球放入该水槽中(假设球与水槽的底面相切),则水槽内溢出的水的体积约为( )(
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f13a78a5feb056770750c6a0ebebdd2.png)
A.16![]() | B.12![]() | C.10![]() | D.2![]() |
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名校
解题方法
10 . 4个半径为1的球两两相切,下面3个上面1个堆放两层摆放在桌上,问上面的球的最高处到桌面的距离为______ ,在4个球的中间再放1个小球和4个球都相切,小球的半径为______ .
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