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1 . 若
(x、y是实数),则M的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e032cbfed165fe953d35a2ccf6ab7ec.png)
A.正数 | B.负数 |
C.零 | D.以上皆有可能 |
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2023-06-13更新
|
253次组卷
|
3卷引用:安徽省黄山市屯溪第一中学2022-2023学年高一上学期入学实验班选拔考试模拟试卷(一)
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2 . 如图1,在正方形ABCD中,点E是CD上一动点,将正方形沿着BE折叠,点C落在点F处,连接BE,CF,延长CF交AD于点G
(1)求证:
;
(2)如图2,在已知条件下,延长BF交AD于点H.若
,
,求线段DE的长;
(3)将正方形改成矩形,点E是CD上一动点,同样沿着BE折叠,连接CF,延长CF,BF交直线AD于G,H两点,若
,
,求
的值(用含k的代数式表示).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/95706dd2-78af-4151-b667-b9d67c953e80.png?resizew=488)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f3093ffb7f78608f593447157f13d0e.png)
(2)如图2,在已知条件下,延长BF交AD于点H.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7166924a6936059fb904c039eba339b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002767b8780fc8bf7aafc7beb2bae1e1.png)
(3)将正方形改成矩形,点E是CD上一动点,同样沿着BE折叠,连接CF,延长CF,BF交直线AD于G,H两点,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ae51f42830225591fa7b9f26052b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7166924a6936059fb904c039eba339b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5731d679887ca3bbf45d476c5d16b4.png)
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3 . 刘勰在《文心雕龙》中说:“造化赋形,支体必双:神理为用,事不孤立.夫心生文辞,运裁还虑高下相须,自然成对.”在数学上也经常利用对仗(对偶)思想解决有关问题,比如
的对偶式是
,可以用来无理式的有理化.请利用上述材料解决以下问题:
(1)已知
,比较a、b、c的大小关系;
(2)求不超过
的最大整数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab46ea0cba2d06283fae3d864a2329e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47cfe4e08c06bde245e58aa22485044c.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/222fc9f0792be19b29964f97c18d0a39.png)
(2)求不超过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9008c7547249316a343e08f098c329.png)
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4 . 如图①,在
中,
,两条直角边边长分别为
,b,斜边长为c,如图②,现将与
全等的四个直角三角形拼成一个正方形
.
(1)利用图②证明勾股定理即在
中证明:
;
(2)若
的两直角边之比为
,现随机向图②内掷一枚小针,则针尖落在四个直角三角形区域的概率是多少?
(3)如图③所示,过点D作DF的垂线交小正方形对角线EF的延长线于点G,连接CG,延长BE交CF于点M,交CG于点H,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1a3b94566843e92ce775ff6bdf386fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a2dae4056db39071c7144f64e68f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1a3b94566843e92ce775ff6bdf386fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/14/b5e0c17b-c03e-48f0-9c15-a2d436f5e8b9.png?resizew=488)
(1)利用图②证明勾股定理即在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1a3b94566843e92ce775ff6bdf386fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3133ef62aad6bdd6637140620f068fad.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1a3b94566843e92ce775ff6bdf386fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9583f85fd629aec99507236814acaf45.png)
(3)如图③所示,过点D作DF的垂线交小正方形对角线EF的延长线于点G,连接CG,延长BE交CF于点M,交CG于点H,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ff22cc8e398040e9fae2aee87572ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f68c7b6efb2fec162dbc8425758dc03.png)
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5 . 盲盒为消费市场注入了活力,既能够营造消费者购物过程中的趣味体验,也为商家实现销售额提升拓展了途径.某商家将蓝牙耳机、多接口优盘、迷你音箱共22个,搭配为A,B,C三种盲盒各一个,其中A盒中有2个蓝牙耳机,3个多接口优盘,1个迷你音箱;B盒中有蓝牙耳机与迷你音箱的数量之和等于多接口优盘的数量,蓝牙耳机与迷你音箱的数量之比为3:2;C盒中有1个蓝牙耳机,3个多接口优盘,2个迷你音箱,经核算,A盒的成本为150元,B盒的成本为250元(每种盲盒的成本为盒中蓝牙耳机、多接口优盘、迷你音箱的成本之和).则C盒的成本为___________ 元
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6 . 若把第n个位置上的数记为
,则称
有限个有序放置的数为一个数列A.定义数列A的“伴生数列”B是:
,其中
是这个数列中第n个位置上的数
,2,3,
,k且
,并规定
,
.如果数列A只有四个数,且
依次为2,4,2,3,则其“伴生数列”B是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ae6558e11384a40f3a338b73385ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262f1462719358f378982cbea31db65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79b9eaa5e7ab7a1e5c512b571914dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee7bb49247387a9028602315729f8d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4dce0247ca8aee11cdc8149baf6aabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de15039797b7480f81c32f0dd2d316ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cdf726dbbd0c77ff86be13d02d8197e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ccd22fd0ca1a8e1468329284f91b6a.png)
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7 . 如图,一次函数
与反比例函数
的图象交于A,B两点,点M在以
为圆心,半径为1的⊙C上,N是
的中点,已知
长的最大值为
,则k的值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a9b769d70cb6f29e965c800921c8ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0b612460326448de36e160c8d29af9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a56e5ddc6dc057aa4076130cc6ce19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/d6a65622-5daf-4523-b6e2-9fcc5b0df484.png?resizew=199)
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8 . 如图,在矩形ABCD中,
,对角线相交于点O,动点M从点B向点A匀速运动(到点A即停止),点N是AD上一动点,且满足
,连接MN,在点M、N运动过 程中,则以下结论中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a09e2ad192430db0c0b1c736d727807.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a51322acafd53c29ce5c7444d3649cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/c706c888-5b8a-43ec-a80d-0ab2b4cb1969.png?resizew=167)
A.△AMN和△MON的面积不可能相等 | B.点M、N的运动速度不相等 |
C.△AMN的面积先减小再增大 | D.![]() |
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9 . 电影票每张50元,如果有
个人排队买票,其中m个人各持有50元面值的人民币一张,另外n个人各持有100元面值的人民币一张,而票房没有预备找零,当
时,将这
个人排成一列顺序购票且无需因为等待找零耽误时间的排队种数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d883d7c925d974922cd11e2d4f206a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
A.12 | B.14 | C.16 | D.18 |
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10 . 如图,直线
与坐标轴交于
、
两点,点
是线段
上的一个动点,过点
作
轴的平行线交直线
于点
,
绕点
顺时针旋转
,边
扫过区域(阴影部分)面积的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9427de5d22d37859a110dbb234313c1.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812eed46a589bde8b7c78a81a8cf9b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/65ea167a-2137-4a4b-9239-6019043a64ed.png?resizew=175)
A. ![]() | B.![]() | C.![]() | D.![]() |
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