1 . 四边形具有不稳定性,对于四条边长确定的四边形.当内角度数发生变化时,其形状也会随之改变.如图,改变正方形
的内角,正方形
变为菱形
.若
,则菱形
的面积与正方形
的面积之比是( )
![](https://img.xkw.com/dksih/QBM/2021/9/15/2808765401153536/2810832115441664/STEM/f08c7352-72a3-4acf-9e83-bd5fc98300c8.png?resizew=293)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ecdb698bd9d00d684430e911e4d99d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94271b265c57ad4d17d2c97c7a4f1613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ecdb698bd9d00d684430e911e4d99d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aad4c2109f60fcbf5488a545b16c6c.png)
![](https://img.xkw.com/dksih/QBM/2021/9/15/2808765401153536/2810832115441664/STEM/f08c7352-72a3-4acf-9e83-bd5fc98300c8.png?resizew=293)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 下列运算正确的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2021-09-19更新
|
123次组卷
|
2卷引用:河北省唐山市遵化市2021-2022学年高一上学期开学质量检测数学试题
3 . 如图,在梯形
中,
,
,
,现平行移动腰
至
后,再将
沿
折叠,得
,则
的度数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/7a30e326-e9fb-46c8-bac4-27220c323cfb.png?resizew=197)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc25c5c0f4318d14ebca8e4ba18584e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb27272b4eb9ed057dd3b4d40697e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a053d0e89c5d766d5839db7398c8ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99fbe87b1253e909fea69ab2192fbe94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb747254a5fba349e80009beec0953de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/7a30e326-e9fb-46c8-bac4-27220c323cfb.png?resizew=197)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
4 . 如图所示的几何体是由一些小正方体组合而成的,若每个小正方体的棱长都是
,则该几何体俯视图的面积是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/aad1cea8-b5f7-46ab-bafb-562189429c92.png?resizew=88)
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5 . 观察下列图形的构成规律,依照此规律,第
个图形中共有________ 个“•”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://img.xkw.com/dksih/QBM/2021/9/15/2808765401153536/2810832115539968/STEM/3210a59c-97e7-4fd2-85be-056195836764.png)
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2021-09-18更新
|
90次组卷
|
2卷引用:河北省唐山市遵化市2021-2022学年高一上学期开学质量检测数学试题
6 . 如图,在四边形
中,
,
,动点
从
开始沿
边向
点以
的速度运动,动点
从点
开始沿
向
点以
的速度运动,
,
分别从点
,
同时出发,当其中一点到达终点时,另一点也随之停止运动,运动的时间为
秒.
![](https://img.xkw.com/dksih/QBM/2021/9/15/2808765401153536/2810832115703808/STEM/5342823a55174dc788246509316798a3.png?resizew=230)
(1)
为何值时,四边形
为矩形?
(2)
为何值时,四边形
为平行四边形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21e0f88eb08617a47678fee9f70ba70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfb8fd7ceba575602e6cdaacf2b5713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79789686104cab147c239d152271e076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2021/9/15/2808765401153536/2810832115703808/STEM/5342823a55174dc788246509316798a3.png?resizew=230)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dd74d529f994ca8e67630f774a639b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5c203fa789096869f098e7b024dae26.png)
您最近一年使用:0次
2021-09-18更新
|
38次组卷
|
2卷引用:河北省唐山市遵化市2021-2022学年高一上学期开学质量检测数学试题
7 . 如图,是一道例题及部分解答过程,其中
,
是两个关于
,
的二项式.请仔细观察上面的例题及解答过程,完成下列问题:
![](https://img.xkw.com/dksih/QBM/2021/9/15/2808765401153536/2810832115556352/STEM/6da06dda-9952-40eb-a79f-4aeaf998baa3.png?resizew=426)
(1)直接写出多项式
和
,并求出该例题的运算结果;
(2)求多项式
与
的平方差.
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/2021/9/15/2808765401153536/2810832115556352/STEM/6da06dda-9952-40eb-a79f-4aeaf998baa3.png?resizew=426)
(1)直接写出多项式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)求多项式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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8 . 已知
,且
成立,则
的取值范围_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e68a83b4093280ea8750677f6828bf47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4eefe9da62d8e6b94e3353f85693ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f72d294eb8ac6ee1958d8fdbdec88fb.png)
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名校
9 . 若实数
满足
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23151197bc96a207adffe46abd2db9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cf731de80fc7d415426ac97ecbb7c7.png)
A.![]() | B.2 | C.2或![]() | D.![]() ![]() |
您最近一年使用:0次
2020-11-06更新
|
1105次组卷
|
4卷引用:河北省正定中学2020-2021学年高一下学期开学考试数学试题