1 . 在三棱柱
中,侧面
为菱形,且侧面
底面
,
,
,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/6aca164b-a045-48ce-bed6-bf8eec24ece4.png?resizew=173)
(1)求证:直线
平面
;
(2)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e2385ec6765cff01b2d00664d4aad7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd38f4fd6af2418573bcc7b67119be5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/6aca164b-a045-48ce-bed6-bf8eec24ece4.png?resizew=173)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71807a35b3170fce28ee6edf4c00d083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b23ab3d97efe1fe0aa065c1e1ac1a30e.png)
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2019-05-12更新
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2卷引用:【市级联考】安徽省芜湖市2019届高三5月模拟考试数学(文)试题
2 . 已知数列
为等差数列,且公差
,其前
项和为
,
,且
,
,
成等比数列.
(1)求等差数列
的通项公式;
(2)设
,记数列
的前
项和为
,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c54d5486e90e07c8fffd53fc213dbae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da2f386b78cdf6489efaa2f5820d3e.png)
(1)求等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0138d1c1aef8123c18084fe3567ee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c215db1d8f69757118ad405b78035628.png)
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3 . 某空间几何体的三视图如图所示,其中俯视图的虚线为半圆弧,则该几何体的体积为________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/dbc58a5b-0377-4b57-99ee-7bc3d9318777.png?resizew=220)
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解题方法
4 . 已知
.若
,那么实数
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4c30e2a707a92ce80e57a2f2b1816f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba747b012e561772585cee5108d8f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2019-05-12更新
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2卷引用:【市级联考】安徽省芜湖市2019届高三5月模拟考试数学(文)试题
5 . 已知圆
及直线
,当直线
被圆
截得的弦长最短时,直线
的方程为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b3e4c2670b1d4a77edd138df812802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4d8e12bbe0e28a02471682756972b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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2019-05-12更新
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1903次组卷
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5卷引用:【市级联考】安徽省芜湖市2019届高三5月模拟考试数学(文)试题
6 . 在
中,内角
,
,C的对边分别为
,
,
,
,
,
,平面内有一点
满足
,则线段![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978d92edf0c4c1ef8620c17df75d35e.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e406f96574cba145f0543df1b8dea482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e92561ba572b4866a7b405e07691e1dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978d92edf0c4c1ef8620c17df75d35e.png)
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7 . 已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
,直线
与椭圆相交于
,
两点,若椭圆上存在异于
,
两点的点
使得
,则离心率
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f82eb4ba631d0f50d848aa6e576b379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/581883ebe87c4cb40f46be68ce318057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-05-12更新
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2360次组卷
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7卷引用:【市级联考】安徽省芜湖市2019届高三5月模拟考试数学(文)试题
【市级联考】安徽省芜湖市2019届高三5月模拟考试数学(文)试题内蒙古自治区赤峰二中2019-2020学年高二上学期10月月考数学(理)试题山西省怀仁市2021-2022学年高二上学期期中数学(文)试题山西省怀仁市2021-2022学年高二上学期期中数学(理)试题(已下线)第42讲 椭圆(练) — 2022年高考数学一轮复习讲练测(课标全国版)(已下线)易错点13 圆锥曲线及直线与圆锥曲线位置关系-1新疆昌吉州行知学校2021-2022学年高二上学期期末考试数学(文)试题
名校
8 . 已知函数
(
,
,
)的图象如图所示,令
,则下列关于函数
的说法中正确的是( )
![](https://img.xkw.com/dksih/QBM/2019/5/11/2201564190949376/2202019855671296/STEM/45b8ff07-585a-4a87-b865-27738e3dd91b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20be4abeb3c2da2f31c090ed4b50313a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13378be06b6b01bcad1d261ff14e87cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89040554aa79926881b74fe954e4d08a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d67256fb95d1035d27a4b444a940071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://img.xkw.com/dksih/QBM/2019/5/11/2201564190949376/2202019855671296/STEM/45b8ff07-585a-4a87-b865-27738e3dd91b.png)
A.函数![]() ![]() ![]() |
B.函数![]() |
C.函数![]() ![]() ![]() ![]() |
D.若函数![]() ![]() ![]() ![]() ![]() |
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2019-05-12更新
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4卷引用:【市级联考】安徽省芜湖市2019届高三5月模拟考试数学(文)试题
名校
9 . 函数
的部分图象大致为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f9a32e4833e5f809c74eb0fea41a79.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2019-05-12更新
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544次组卷
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3卷引用:【市级联考】安徽省芜湖市2019届高三5月模拟考试数学(文)试题
10 . 如图,点
为单位圆上一点,
,点
沿单位圆逆时针方向旋转角
到点
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/b180978a-384f-4eaa-b4a1-f2dbc7d5302c.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b60cd21d349a1b8ba9480b838cbea0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe813411cae9cb24965d7de437cc2107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b80751c98f9991b9cfc03923a98834.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/b180978a-384f-4eaa-b4a1-f2dbc7d5302c.png?resizew=176)
A.![]() | B.![]() | C.![]() | D.![]() |
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