1 . 实践操作:
第一步:如图1,将矩形纸片
沿过点
的直线折叠,使点
落在
上的点
处,得到折痕
,然后把纸片展平.
第二步:如图2,将图1中的矩形纸片
沿过点
的直线折叠,点
恰好落在
上的点
处,点
落在点
处,得到折痕
交
于点
交
于点
,再把纸片展平.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/3274c214-8391-4e0d-acc1-1db0495f3bed.png?resizew=293)
问题解决:
(1)如图1,填空:四边形
的形状是__________.
(2)如图2,线段
与
是否相等?若相等,请给出证明;若不等,请说明理由;
(3)如图2,若
,求
的值.
第一步:如图1,将矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
第二步:如图2,将图1中的矩形纸片
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765ea5b7cfea102af1be802787ed42eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3275edb14633cbd5fae25fcc0276628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/3274c214-8391-4e0d-acc1-1db0495f3bed.png?resizew=293)
问题解决:
(1)如图1,填空:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0054610b07c11f3cb88aa87b58c2df11.png)
(2)如图2,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199336204fbca97766bf24b1dc5fdc53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33bd96f676101869a9f1bc692066c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd13e6bd1e3d7815d82b6fe073123af5.png)
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2 . 已知
为
的切线,
与
交于
,弦
经过点
.求证:
平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2891b18eef907a1aa06c0920a5a6bc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091e86ca89e484b331fd90125a5e5af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/7f2a1ea6-c457-4c35-b9a6-550171c095e0.png?resizew=195)
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2卷引用:安徽省蚌埠第二中学2020-2021学年高一上学期自主招生考试数学试题
3 . 在边长为6的等边
(如图甲)中,已知点A,B分别为
的中点,现将
沿直线
翻折,使点P在底面
的射影刚好为对角线
与
的交点H,连接
得到四棱锥
(如图乙).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/d1d61b73-922f-4ce1-a0a9-2a235ba8deae.png?resizew=290)
(1)求证:平面
平面
.
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb46aaae98bce8e66848e09c2c1cdbd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/24e7344dca1e40bf072371ddd5640111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/d1d61b73-922f-4ce1-a0a9-2a235ba8deae.png?resizew=290)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
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真题
4 . 如图,
为椭圆的两个顶点,
为椭圆的两个焦点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/81b84268-931b-499e-914d-cc9003bd1086.png?resizew=397)
(1)写出椭圆的方程及准线方程;
(2)过线段
上异于O,A的任一点K作
的垂线,交椭圆于P,
两点,直线
与
交于点M.求证:点M在双曲线
上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32622697953ab5e4b4e35cd62d1b1c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/81b84268-931b-499e-914d-cc9003bd1086.png?resizew=397)
(1)写出椭圆的方程及准线方程;
(2)过线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aba947934b05caae8b0c1fb1a522a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d49e09b17b19d7c787e95bcf1e9731.png)
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解题方法
5 . 对于实数构成的集合
.若对任意
都有
(其中“
”表示普通的乘法运算),则称集合
对“
”是封闭的.
(1)已知集合
,判断
是否属于集合
;
(2)在(1)的条件下,若
,证明
的充要条件是
;
(3)若集合
对“
”都是封闭的,试判断
是否对“
”封闭,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8af42f2ec410ad1b28be69d3415ed10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9f1ff137e76626b7b608cef7c36349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
(1)已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50dae68b646f975a8a0c6bed67d028ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57ed82958abb00776e75987aa62d723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ecef225b27b5857d2d76fbe5b34982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf22d7d1a965bda25168a233fb6290c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff58fdfe14af9fb8aa0e0cf0d60853a.png)
(3)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a3375139541ed61929fa658f16bb7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
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6 . 已知关于
的一元二次方程![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559299f59b89b7f033dc95f56c1a0b70.png)
(1)
时,求证:方程一定有两个实数根.
(2)有甲、乙两个不透明的布袋,甲袋中装有3个除数字外完全相同的小球,分别标有数字1,2,3,乙袋中装有4个除数字外完全相同的小球,分别标有数字
,从甲袋中随机抽取一个小球,记录标有的数字为
,从乙袋中随机抽取一个小球,记录标有的数字为
,利用列表法或者树状图,求
的值使方程
两个相等的实数根的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559299f59b89b7f033dc95f56c1a0b70.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc2371f9a64360a759b658db846aa166.png)
(2)有甲、乙两个不透明的布袋,甲袋中装有3个除数字外完全相同的小球,分别标有数字1,2,3,乙袋中装有4个除数字外完全相同的小球,分别标有数字
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f14db37344529d273e36d835241d0d39.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/2c61bd0e9c2313936d4c4cdc1c8f1eb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559299f59b89b7f033dc95f56c1a0b70.png)
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2021-08-10更新
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2卷引用:北京市中国人民大学附属中学2019-2020学年高一分班考试数学试题
7 . 已知数列
中,
,用数学归纳法证明
能被4整除,假设
能被4整除,然后应该证明( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b08bd3ef8d559b866eed9185eb4eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c0a2ab7198ec8e80904285ca6eb762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63b4a890d6f9d71128777f8e63c9e2a.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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8 . 如图给出的是一道典型的数学无字证明问题:各矩形块中填写的数字构成一个无穷数列,所有数字之和等于1.按照图示规律,有同学提出了以下结论,其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/c7eb79a1-86ba-40ef-a1c0-9de86537031f.png?resizew=168)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/c7eb79a1-86ba-40ef-a1c0-9de86537031f.png?resizew=168)
A.由大到小的第八个矩形块中应填写的数字为![]() |
B.前七个矩形块中所填写的数字之和等于![]() |
C.矩形块中所填数字构成的是以1为首项,![]() |
D.按照这个规律继续下去,第n-1个矩形块中所填数字是![]() |
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5卷引用:新疆克拉玛依市2019届高三三模数学(理)试题
新疆克拉玛依市2019届高三三模数学(理)试题新疆克拉玛依市2019届高三三模数学(文)试题(已下线)热点03 等差数列与等比数列-2022年高考数学【热点·重点·难点】专练(全国通用)黑龙江省大庆实验中学2021-2022学年高二上学期期末考试数学试题(已下线)第05讲 等比数列的前n项和公式-【帮课堂】2021-2022学年高二数学同步精品讲义(人教A版2019选择性必修第二册)
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9 . (1)用反证法证明命题“存在实数x,使得sinx=x”时,“假设”的内容是:___________ .
(2)已知命题p:∀x≥1,使得
,则
p为___________ .
(2)已知命题p:∀x≥1,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bff1a588a67b0b29fbd65b78dd68543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a45a62af2453837041c28e79295415.png)
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解题方法
10 . 已知指数函数
,且
)过
;在①
,②函数
的顶点坐标为
,③函数
,且
过定点
从这三个条件中任选一个,回答下列问题.
(1)求
的解析式,判断并证明
的奇偶性;
(2)解不等式:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d201389571180846b7b0025d6aebaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64d924836b4292239d9726c6473d7f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef782ee17ff19b2ab3a9cc77c0b206e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce71f8ee506de7f71c4b345d532dedf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64d924836b4292239d9726c6473d7f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aed3e7ae49f3b915bb431f0d1be48e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2338b708fdb65059623cc53a729b2a52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ae7f8551614b506d0c94a719f58c716.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15166e63c54eee19d27e49e63a1fa76a.png)
(2)解不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357fddd0030b6b1fcc7c5a4b7b179b2f.png)
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2021-08-27更新
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192次组卷
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3卷引用:福建省三明第一中学2020-2021学年高一上学期期中考试数学试题(B卷)