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1 . 三张卡片,分别写有1和2,1和3,2和3.甲,乙,丙三人各取走一张卡片,甲看了乙的卡片后说:“我与乙的卡片上相同的数字不是1”,乙看了丙的卡片后说:“我与丙的卡片上相同的数字不是2”,丙说:“我的卡片上的数字之和不是4”,则甲的卡片上的数字是______ .
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2 . 我国古代数学名著《九章算术》的论割圆术中有“割之弥细,所失弥少,割之又割,以至于不可割,则与圆周合体而无所失矣.”它体现了一种无限与有限的转化过程.比如在表达式
中“...”即代表无数次重复,但原式却是个定值,它可以通过方程
求得
.类比上述过程,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdf504a4f533b0d3990832daae0b860.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81e79197bce5d1859fcbfeadd6218f3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6977b6bb77c43822da13161ab1e674bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e3a9c7590825bfeeff83359c2513346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdf504a4f533b0d3990832daae0b860.png)
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3 . 在商店里,如图分层堆砌易拉罐,最顶层放1个,第二层放4个,第三层放9个.如此下去,第六层放___________ 个.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/32076bae-9bd0-4a33-9240-65db5a32eb0a.png?resizew=145)
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4 . 在平面直角坐标系
中,已知直线
在
轴上的截距为
,在
轴上的截距为
,且
,则直线
的截距式方程为
;类似的,在空间直角坐标系
中,若平面
与
轴、
轴、
轴的交点分别为
,
,
,且
,则平面
的截距式方程为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae9ba258299eb489b490594397e23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/157a63913fa5f9d1497a3734bdaeec96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd3ea554707fa3fc12fc9de51c94e4fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5622d4be6bba8c7a6851dc082ef34fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d1f4b53c90e4c31dd35b4bb548c5193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e96f2368d04db6d0e05de46e97e29f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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5 . 根据下述事实,写出一个含有量词的全称量词真命题或存在量词的真命题:________
,
,
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c904e397a2854240e74510bb477e18.png)
……
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1db1c8f88c5de20586db0cde44d3e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90c94bed97397edf43702cba40b6aec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6dbfcc045a5631d9a2c080b18cc005a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c904e397a2854240e74510bb477e18.png)
……
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6 . 在共有2023项的等比数列
中,有等式
成立,类比上述性质,在共有2023项的等差数列
中,相应的有等式______ 成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80eae440bc359521b680637e9401b797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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7 . 已知
,
,
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4292234d8a1c922266e2e53f8048c95b.png)
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e181cf680167b7aa6808d7b9e803f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d499cf8b05914b0a434396d4846929a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d84f9bfb2c9de5beef25d4edf529f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4292234d8a1c922266e2e53f8048c95b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89ba85f74cda4ddd621278e558bc036f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
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8 . 已知“整数对”按如下规律排成一列:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1004cd6b0248112f252283d2b9113130.png)
,则第60个“整数对”为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1004cd6b0248112f252283d2b9113130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0de403ed8d0d85ec924f7e5847c11b7.png)
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9 . 15只鹦鹉和15只八哥关在10个笼子里,每个笼子三只鸟,鹦鹉说真话,八哥说假话,问“笼子里面有八哥吗”,有21只鸟回答没有,则只有鹦鹉的笼子有__________ 个.
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10 . 将全体正整数排成一个三角形数阵:
1
3 2
6 5 4
10 9 8 7
……
按照以上排列的规律,第
行
从左向右的第1个数为__________ .
1
3 2
6 5 4
10 9 8 7
……
按照以上排列的规律,第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd432e2abf32a492b87a64728b2f57a5.png)
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