学校准备在校运动会开幕式上进行大型队列展示,通过变换队形,摆出不同造型,8路纵队(每路人数相同)进场,队列在主席台前一分为二,使两边的人数相同;接着,从一边走出96位学生到另一边,这时两边的学生刚好可以各自组成一个正方形队列.问这次队列展示至多需要多少名学生?
21-22七年级下·全国·单元测试 查看更多[2]
更新时间:2023-05-15 10:11:33
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适中
(0.65)
【推荐1】(1)已知
,
,且
,求
的值;
(2)已知
与
互为相反数,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8cbb247c6ed56338bb6750b9e23bf56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78866ea635f38545bca721b65af19884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ed37ee7432002cd0e0978b2012e184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f2416d1f75a45a314331146550832e.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3cdffae7eae7d724d57319774cb4723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f6b786a1cf6061f710fc3817b046dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5619c20c44cbdfce370953e69e22c4.png)
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名校
【推荐2】请根据图示的对话解答下列问题.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/cd78a0f3-5273-45d1-84cb-9ee2874cde82.png?resizew=392)
求:(1)
的值;
(2)
的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/cd78a0f3-5273-45d1-84cb-9ee2874cde82.png?resizew=392)
求:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23266e6668999cd5b5b3e5b4f97d94d4.png)
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适中
(0.65)
【推荐1】如图1所示的圆形盘子,外圆半径是
,内圆半径是
,现在要给盘子环形部分上釉(图2阴影部分),如果![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f3d436ac291eb488646721d8617e069.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2384f0780f2432ad4084e620ea984491.png)
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/fc79839f-273e-40d6-834f-2a1770479e41.png?resizew=229)
请求出阴影部分的面积.(结果保留
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ae196996ab19c015e7f4eb8ba09982e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104e109ddc148a3a656dcfc272d31a98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f3d436ac291eb488646721d8617e069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/fc79839f-273e-40d6-834f-2a1770479e41.png?resizew=229)
请求出阴影部分的面积.(结果保留
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
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【推荐2】(1)观察下列式子的因式分解做法:
①
;
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008d41b41780f53c31db8fff762972f3.png)
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f5c30a7db29f8836c56580689ba4862.png)
......
(2)模仿以上做法,尝试对
进行因式分解;
(3)观察以上结果,猜想
;(n为正整数,直接写结果,不用验证)
(4)根据以上结论,试求
的值.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2096f82ea50feced750d822e35bdd188.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008d41b41780f53c31db8fff762972f3.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f5c30a7db29f8836c56580689ba4862.png)
......
(2)模仿以上做法,尝试对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd18dbe9dd777971a5a133a64c58a33.png)
(3)观察以上结果,猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50378df734e2117c6dd865073a838bd8.png)
(4)根据以上结论,试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caeacf8e0f573dbe3ad0ec3759cdbb5a.png)
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