1 . 观察以下等式:
第1个等式:
,
第2个等式:
,
第3个等式:
,
……
按照以上规律,写出第4个等式为_____ ,第n个等式为_____ .
第1个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a964f774d2c6d41532760508e5de319.png)
第2个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a522459325f28fd079335dc400081d84.png)
第3个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70ad796101805d239c99b9e29eff669.png)
……
按照以上规律,写出第4个等式为
您最近一年使用:0次
2 . 如图,正方形
的边长为1,以
为边作第2个正方形
,再以
为边作第3个正方形
,按照这样的规律作下去,第2024个正方形的边长为______ .
![](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/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec03c3bbcf8ee95cef9824236eb491a.png)
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3 . 某杠杆装置如图,杆的一端吊起一桶水,阻力臂保持不变,在使杠杆平衡的情况下,小康通过改变动力臂
,测量出相应的动力
数据如下表:
动力
动力臂
阻力
阻力臂![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
请根据表中数据规律探求,当动力臂
长度为
时,所需动力最接近的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cbd292edd70736f07fa1022a1e11ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
动力臂( | |||||||
动力( |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1473507e38933e6797b99fe42bac26a5.png)
A.300N | B.180N | C.150N | D.120N |
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4 . 用火柴棍摆出一组如图所示的图形:
个图形用火柴棍的根数为_____ (用含
的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2024-06-08更新
|
162次组卷
|
3卷引用:2024年湖北省荆州市中考二模数学试题
5 . 如图,一只电子蚂蚁P,在平面直角坐标系xOy中按箭头所示方向作折线运动,即
,
,
,
,
,
,…,按照这样的运动规律,
的坐标为______ ;
的坐标为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6210cf4b650b31d300af489b6e3e6e33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3188893df44bbc01f64fcccbd63c66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20371c5fa55156ecde115735a9b84641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1162ad348a9785bc991ef93027e15e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09092a462e54d2067a03199abc1ae90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5837552d9f1d37bc06e197ba425e1283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4021d8c07cc5a3884fddce56f1f6cb87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/457713c3ada6b1bf0b7242fe48635a0d.png)
您最近一年使用:0次
6 . 如下图,用黑白两种颜色的平行四边形纸片,按黑色纸片数逐渐增加1的规律拼成下列图形,若第n个图案中有2020个白色纸片,则n的值为( )
A.671 | B.672 | C.673 | D.674 |
您最近一年使用:0次
7 . 先观察下列等式,再回答问题:第一个等式
;第二个等式
;第三个等式
.
(1)根据上述三个等式提供的信息,请你猜想第五个等式;
(2)请按照上面各等式反映的规律,试写出第n个等式(n为正整数);
(3)对于任何实数a,
表示不超过a的最大整数,如
,
,计算:
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf95b3a5cec45d465ac90ee1fd0c1917.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21c771935207f871f494361a9732879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336269aed514ecd40a270f847c93d7eb.png)
(1)根据上述三个等式提供的信息,请你猜想第五个等式;
(2)请按照上面各等式反映的规律,试写出第n个等式(n为正整数);
(3)对于任何实数a,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0306c8a9b082d56b04c967093ddf256a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9feb047004eb507de484a7f8c5b6a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ec30acc4f5d73891eb485a64e9d5d44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38dd4d2a44b771f5466af8562517406.png)
您最近一年使用:0次
8 . 如图,在平面直角坐标系
上有点,点
第一次跳动至点
,第二次点
向右跳到
,第三次点
跳到
,第四次点
向右跳动至点
,
,依此规律跳动下去,则点
第
次跳动至点
的坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8950c7bc835103d52ceffab14b6b31a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07f58edb55d5e3e8ea346093512e5ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c79d684ca626f750b360aa68bb7ea371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c62e773e45726bb1a36127bc89817bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b56e44e4f0424a2b7a45567120a2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9da5cf8d5328144af50f5bf6c61769a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cdcc58d8679574ac955c1ae5b01e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb80913fc086c6a264ed476d193e7344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb23814c40a4929a6483d60a413968da.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 在平面直角坐标系中,横纵坐标均为整数的点称为整数点,如图,一列有规律的整数点,其坐标依次为
,
,
,
,
,
,…,根据规律,第2024个整数点坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad20e2bc6576fc461419f8f138d26e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29343388ca8b33dc98325e65382b38a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86022205a7487439dd8d0897cd3bf19.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
10 . 如图,
为等腰直角三角形,
,以斜边
为直角边作等腰
, 再以
为直角边作等腰
,…,按此规律作下去便得到了一个海螺图案,则
的长度为________ . (用含n的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15536798ab47cadce6d4d80f542051f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee5747ae1c372be1170242c4aecee5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c76916c6ff302cf4fb4b6ace5bb3a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80ca3761aedb2416aeff29acdcb5407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/181f7b988095b7285557491c7bb2fb5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c7c555197ee0ba4c6ce1d2de599a1ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/337d0dc1076cfdb02ffb40bf4dac0d90.png)
您最近一年使用:0次
2024-04-26更新
|
76次组卷
|
8卷引用:湖北省孝感市汉川市2023-2024学年八年级下学期期中数学考题
湖北省孝感市汉川市2023-2024学年八年级下学期期中数学考题2022年宁夏银川市第十五中学中考数学一模试题四川省眉山市仁寿县2022-2023学年八年级上学期期末数学试题(已下线)专题3.6 勾股定理章末八大题型总结(培优篇)-2023-2024学年八年级数学上册举一反三系列(苏科版)(已下线)专题1.6 勾股定理章末八大题型总结(培优篇)-2023-2024学年八年级数学上册举一反三系列(北师大版)(已下线)专题2.14 特殊三角形章末十八大题型总结(培优篇)-2023-2024学年八年级数学上册举一反三系列(浙教版)(已下线)专题14.6 勾股定理章末八大题型总结(培优篇)-2023-2024学年八年级数学上册举一反三系列(华东师大版)2024年江苏省苏州市吴江区中考数学二模试题