1 . 化循环小数为分数:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1614b07a69a5c23ef6902a2770569c6.png)
___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1614b07a69a5c23ef6902a2770569c6.png)
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2 . 已知方程
的两根分别为
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b511c2f126fd5ebe753f0ceb13ec676a.png)
________ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1a97f1258df718f8072985ce79110b.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab7fdbe52a712e4765dec6f0d985b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b511c2f126fd5ebe753f0ceb13ec676a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1a97f1258df718f8072985ce79110b.png)
您最近一年使用:0次
解题方法
3 . 在四边形
中,对角线
与
交于点
,若
,则四边形
一定是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24eda22a30fc9649f5325c434c999796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.矩形 | B.梯形 | C.平行四边形 | D.菱形 |
您最近一年使用:0次
2024-06-16更新
|
219次组卷
|
2卷引用:海南省2023-2024学年高二下学期期末数学考试试题
名校
4 . 如图,棱锥
的高
,截面
平行于底面
与截面交于点
,且
.若四边形
的面积为36,则四边形
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764829cc2c763b6aca0665aa143e304e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4123df6c5cae71684acabc2fa340c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c736e1a2b1d42a7370210eb827a11e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.png)
A.12 | B.16 |
C.4 | D.8 |
您最近一年使用:0次
2024-06-07更新
|
150次组卷
|
7卷引用:江西省南昌市2019-2020学年进贤二中高二下学期第一次月考数学(理)试题
(已下线)江西省南昌市2019-2020学年进贤二中高二下学期第一次月考数学(理)试题人教A版(2019) 必修第二册 必杀技 第8章 第8.1节 综合训练苏教版(2019) 必修第二册 必杀技 第13章 立体几何初步 13.1 基本立体图形 第13.1节 综合训练(已下线)专题6-2立体几何截面与最值归类-2(已下线)8.1基本立体图形【第二练】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)11.1空间几何体-同步精品课堂(人教B版2019必修第四册)(已下线)专题08 几何体截面与展开最短距离归类(1) -期末考点大串讲(苏教版(2019))
5 . 已知
,
,
是三个不全相等的实数且满足
则
的值是( )
![](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/8627e8e8d56e652abe5914f7d741b3f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae24688d4c45aad43e9af0b7bbfda6b.png)
A.1 | B.![]() | C.3 | D.6 |
您最近一年使用:0次
名校
6 . 二次函数
是常数,且
的自变量
与函数值
的部分对应值如下表:
且当
时,对应的函数值
.下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c53fa91aecb40438f8b53eb97b70bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28b08682efa2692b052f64fe1448fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
… | -1 | 0 | 1 | 2 | … | |
… | 2 | 2 | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d599059e6b2c918ab15ee22611b6962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57458464618fcf619375a93d3c66d69.png)
A.![]() |
B.![]() |
C.关于![]() ![]() ![]() |
D.![]() ![]() ![]() ![]() |
您最近一年使用:0次
名校
解题方法
7 . 如图,已知斜三棱柱
中,底面
是正三角形,
,点O是点A1在下底面内的正投影.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b41ee0f7694690b8ca82158bf210f49.png)
(2)若点O是
的中心,求高度A1O;
(3)在(2)的条件下求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40dcce3e3b82ddca1e9f021ef66b5684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b41ee0f7694690b8ca82158bf210f49.png)
(2)若点O是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)在(2)的条件下求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32bbdf5dbf9df96742624ada95c36146.png)
您最近一年使用:0次
8 . 如图所示,将两块全等的直角三角形纸片
和
叠放在一起,其中
,顶点
与边
的中点重合,
交
于点
交
于点
,则重叠部分
的面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7701500ced847d09941996082f7b6737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d5d41f8b8fc5ae91bd53368c4ebe51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f660f3d677ecd3cbf5c63e82690357ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/6ee960e7-284c-4d5e-85cf-dcbbdf179f0e.png?resizew=160)
您最近一年使用:0次
2024-04-03更新
|
57次组卷
|
2卷引用:河南省南阳市西峡县第一高级中学2023-2024学年高二下学期第一次月考数学试卷
23-24高二上·全国·课后作业
9 . 已知
,
满足方程组
,则
的值是__ .
![](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/597aa6936027d2ce9eef0fde3508818a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba317690c72a1d29babd8c6d303b0eaa.png)
您最近一年使用:0次
名校
10 . 如图所示,
是圆
的直径,
是圆
上一点,以
为切点的切线交线段
的延长线于点
,作
于
于
.
(1)求证:
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d2330ed65217dfa342e5aefb58a34f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5436a255a433d253bb3573016ed579.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/c5ba968a-bf09-444b-a720-ebea15e52842.png?resizew=161)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fa59286f0f6578d21ca854ebd74fe9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/327a6d654db907de3c07cb3a62248364.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
您最近一年使用:0次