1 . 如图,在三棱锥中,点
满足
,则
( )
A.![]() | B.![]() | C.2 | D.![]() |
您最近一年使用:0次
2024-03-21更新
|
424次组卷
|
2卷引用:贵州省黔东南州2023-2024学年高二上学期期末检测数学试题
解题方法
2 . 如图所示的多面体由三棱锥
与四棱锥
对接而成,其中
平面
,
,
,
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/a0a07e97-09bc-4edd-b967-91401c0b3e26.png?resizew=160)
(1)求证:
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ee3afb7e2c8943673449a1b136faf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13af10a75e451272786dff8876a809f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4a6b8ef3e79b4482388c3391d8b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29f27c9a3af7044faf147bdaeb3fe81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46959dac6ffa1ae2c2cc1877fff7d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70801d43498c8ae772b960f0353131f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1496042c1d721cffd25053e997a9a97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6922690417492dea5c60acd5f031efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/a0a07e97-09bc-4edd-b967-91401c0b3e26.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fcadd3ed6d1b8102d6260091e0bbdb.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c96bc9a285172c48e4726ee6492670ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
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3 . 如图,在直四棱柱
中,底面
为菱形,
为
的中点.
(1)证明:直线
平面
;
(2)若
,且
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/533c27d9-b490-4d35-b107-c60cb120ade0.png?resizew=160)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7542b49ab149f2be8ba6b48392bef1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1baa3d0db9ad31d33c2883a6efed1dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5a86745bfe1dfe7bc2683811210330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d9c4666ac5098d6cf61af1c82dab681.png)
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解题方法
4 . 在
中,角A,B,C的对边分别为a,b,c,向量
,
,且
.
(1)求角C;
(2)若
的外接圆半径为
,面积为
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72795203c10c8be81dae92fc6ffcabc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b1126d904d60927872f943f6a88836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4d070c5939bb0ec4a9d40d7e3c7d3f.png)
(1)求角C;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
5 . 已知函数
,关于
的方程
的实数根的个数为
,则
的所有可能取值组成的集合为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46cdf3be718ae88a923d5a1d64e9076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b14bd9b01ef01720d4b1cb9d90721a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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解题方法
6 . 已知函数
是偶函数,当
时,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/6861a383-11d8-4f4e-b49d-9b7656e39d6a.png?resizew=240)
(1)求
的值,并作出函数
在区间
上的大致图象;
(2)根据定义证明
在区间
上单调递增.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7b4162be068735915bfb30b315632c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/6861a383-11d8-4f4e-b49d-9b7656e39d6a.png?resizew=240)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a57e7e65245a4d173c5d0bc3c34e45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f16a685cbaf10f04e6bbe3d585c9298a.png)
(2)根据定义证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9099a75c433e97bbe05052a00110571.png)
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7 . 已知函数
,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fa6c4346b50e3b42f7f9696a722b515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091f442d32ca702e5404690479b939ac.png)
A.函数![]() | B.存在实数![]() ![]() |
C.当![]() ![]() | D.当![]() ![]() |
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8 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcf4b0cf6235605919cbef4d0b41a1c.png)
(1)若
,求
的值;
(2)若函数
有5个零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcf4b0cf6235605919cbef4d0b41a1c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28638f8c054a7bb4d9b46fde330bc76f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0c63f83d083501b752fc13fb0b4786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
9 . 如图①,筒车是我国古代发明的一种水利灌溉工具,因其经济又环保,至今在农业生产中仍得到使用.如图②,一个筒车按照逆时针方向旋转,筒车上的某个盛水筒
到水面的距离为
(单位:
)(
在水下则
为负数),
与时间
(单位:
)之间的关系是
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/7a252386-beae-4530-b547-284c7e5d60e1.png?resizew=144)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/751d0232-829a-40f5-be0b-211fed46abc0.png?resizew=169)
(1)盛水筒
旋转一周需要多少秒?盛水筒
出水后至少经过多少秒就可以达到最高点;
(2)当
时,判断盛水筒
的运动状态(处于向上运动状态、处于向下的运动状态),并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65502a7ea4d1ce6d6d8c720845c73e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee47827f33c511d7f8f8b24694732d57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/7a252386-beae-4530-b547-284c7e5d60e1.png?resizew=144)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/751d0232-829a-40f5-be0b-211fed46abc0.png?resizew=169)
(1)盛水筒
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9533cdbee15af454832f8c1e7cca55fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
解题方法
10 . 函数
(
,
)的部分图象如图所示,则下列说法中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/edfe6354-d719-48fe-98dd-22072aebab31.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b905692e9d59aaffb87a8fdadf5b9d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0578c8070395b4305720d30bd8fb559b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c923c64d63d2a195e1982f616c23544.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/edfe6354-d719-48fe-98dd-22072aebab31.png?resizew=147)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.若方程![]() ![]() ![]() |
您最近一年使用:0次