对于个位数字不为0的任意一个两位数
,交换十位数字和个位数字的位置,得到一个新的两位数
,记
,
.
例如:当
时,则
,
,
.
(1)计算
和
的值;
(2)若一个两位数
(
,
都是整数,且
,
),
是一个整数的平方,求满足条件的所有
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4f96d1bcb4d6aabedb0b41fbc612653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3adf0cb0c663866c7accf2a4cb7282.png)
例如:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcafcb794c75c30208fa506d0937135.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acfb7f219e45b31a9048646c8dde948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d921107b1658052f7a657885644d5376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffba50e9ab4c160657087a6f79998eba.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6232081f5dbddb703fa94613c8ebaad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea098670ac3bc33a1839a17cf861604.png)
(2)若一个两位数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13bb6abb6d0ce612e8f2bbfffb6206f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9952125a947b88e068d9d7a54583a7d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9683c0a95aaeda96c5793b0f695d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e5cda7d83698e8bbb3466b29f95cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2022-06-07 14:20:05
|
相似题推荐
解答题-计算题
|
较难
(0.4)
【推荐1】看图填空:如图,把一个面积为1的正方形等分成两个面积为
的长方形,接着把面积为
的长方形等分成两个面积为
的长方形,再把面积为
的长方形等分成面积为
的长方形,如此进行下去……
![](https://img.xkw.com/dksih/QBM/2022/6/6/2995537906417664/2995599951364096/STEM/2c58fe9500be4958a20578824f6503e6.png?resizew=216)
(1)试利用图形揭示的规律计算:
=_______.
并使用代数方法证明你的结论.
(2)请给利用图(2),再设计一个能求:
的值的几何图形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca8b26c3ad6d892590290a2304126bd.png)
![](https://img.xkw.com/dksih/QBM/2022/6/6/2995537906417664/2995599951364096/STEM/2c58fe9500be4958a20578824f6503e6.png?resizew=216)
(1)试利用图形揭示的规律计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee397b334df7f7a229fc4c0bc9510cc.png)
并使用代数方法证明你的结论.
(2)请给利用图(2),再设计一个能求:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0c0bd150163fbb878034cda3ebb8176.png)
您最近一年使用:0次
解答题-计算题
|
较难
(0.4)
【推荐2】定义:对任意一个两位数
,如果
满足个位数字与十位数字互不相同,且都不为零那么称这个两位数为“互异数”.将一个“互异数”的个位数字与十位数字对调后得到一个新的两位数,把这个新两位数与原两位数的和与11的商记为
.例如:
,对调个位数字与十位数字得到新两位数21,新两位数与原两位数的和为
,和与11的商为
,所以
.根据以上定义,回答下列问题:
(1)①下列两位数:50,44,35中,“互异数”为______;②计算:
______;
(2)一个“互异数”
的十位数字是
,个位数字是
,且
,求
的值;
(3)如果一个“互异数”
的十位数字是
,个位数字是
,且
,求“互异数”
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f484115a9df1b6060d6b14df85c6f38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22a688b51f4862f610d3064199aeb336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429292d13b3dc2722028089604a5ed88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5460730d1c4ea128323bba0f813b131f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bac24190a701c808a2c2552488045978.png)
(1)①下列两位数:50,44,35中,“互异数”为______;②计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ffd142b7c01fc6de67cc8f1cb3bb527.png)
(2)一个“互异数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1734333c64d445ffb88d719827a1969c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35770a47ffcba6bf1d94eceabb416d96.png)
(3)如果一个“互异数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394aee19f94c2b70fcce1d69b31dc7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028ad9cf772b0c071866972f303528fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2819a55a0a70f60ffd2b974921f98031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
解答题-计算题
|
较难
(0.4)
名校
解题方法
【推荐3】【阅读•领会】怎样判断两条直线否平行?
、
是否平行,可添加“第三条线”(截线
),把判断两条直线的位置关系转化为判断两个角的数量关系.我们称直线
为“辅助线”.
在部分代数问题中,很难用算术直接计算出结果,于是,引入字母解决复杂问题,我们称引入的字母为“辅助元”.
事实上,使用“辅助线”、“辅助元”等“辅助元素”可以更容易地解决问题.
【实践•体悟】
(1)计算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a52d92c5f2cb237cc576e2cd8074165a.png)
这个算式直接计算很麻烦,请你引入合适的“辅助元”完成计算.
(2)如图2,已知
,求证
,请你添加适当的“辅助线”,并完成证明.
【创造•突破】
(3)若关于
的方程组
的解是
,则关于
的方程组
的解为___________.
(4)如图3,
,
,
,我们把大于平角的角称为“优角”,若优角
,则优角
___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
在部分代数问题中,很难用算术直接计算出结果,于是,引入字母解决复杂问题,我们称引入的字母为“辅助元”.
事实上,使用“辅助线”、“辅助元”等“辅助元素”可以更容易地解决问题.
【实践•体悟】
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a52d92c5f2cb237cc576e2cd8074165a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae07f1a2269c37704b8f805f520a6140.png)
(2)如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b580a75fe325a452303871b140d2d568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
【创造•突破】
(3)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6cd080a9606169a33ab55d8a8a27ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e16b9273e78f65b2b9ef641e3bc77fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/834ed0f0ece94a1b3866cc31fa85a289.png)
(4)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be3f064eeaf7c0ef865d6c7b5eafef0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78234ca2d02000d35895109b51605430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6dc301da41bcb80854d15df88a8e4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448d09858d2501298af33aad3e96c5fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf05614b86b54feac3b87eee0b1a6dcb.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】在平面直角坐标系中,
为坐标原点,对任意的点
,定义
,任取点
,
,记
,
,若此时满足:
成立,则称点
与点
相关.
(1)分别判断下面各组中两点是否相关,并说明理由:
①
,
;②
,
.
(2)给定
,
,点集:
,求集合
中与点
相关的点的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27adbbdf0c7cbc36fb03a4ed58c587e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852f7b37b1e7e79213dec3609dfc3b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d5889b7cc7b1c7a94acf547cf6460b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd6ec9a5e10da448444fd88a3e74598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)分别判断下面各组中两点是否相关,并说明理由:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1294434b22cb5133043a2270ae1c43f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e5eea5f7f98ca8632358b7e49ceb25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6314d6f44c7d35b2b4b5cdc041d344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d549fd5b1e6da722932fe43675d5ff18.png)
(2)给定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2934a920ce9ae4736ad40f60839b637d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e00d8f90655e6341907aa9c7c62d4398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c59f0e35b7ae5206e45878934482b8.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如果x是一个有理数,我们定义
表示不小于 x 的最小整数.如
,
,由定义可知,任意一个有理数都能写成
的形式(
).
(1)直接写出
与x,
的大小关系;
提示1:用“不完全归纳法”推导
与x,
的大小关系;
提示2:用“代数推理”的方法推导
与x,
的大小关系.
(2)根据(1)中的结论解决下列问题:
①直接写出满足
的m取值范围;
②直接写出方程
的解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda2bc2e6a5eaf4fa5ff901985dd0e53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a408d3bbb9e884f84e89b220ed006b9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aaaa8424c6a74a7ded0ad227c8c6282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e3a6617847e41276f8a9f1437f3e2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af14ad8c4485fad79dff8720274c5eb.png)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda2bc2e6a5eaf4fa5ff901985dd0e53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b5a9de8a72dda70e3eefeb0a408ffd.png)
提示1:用“不完全归纳法”推导
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda2bc2e6a5eaf4fa5ff901985dd0e53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b5a9de8a72dda70e3eefeb0a408ffd.png)
提示2:用“代数推理”的方法推导
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda2bc2e6a5eaf4fa5ff901985dd0e53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b5a9de8a72dda70e3eefeb0a408ffd.png)
(2)根据(1)中的结论解决下列问题:
①直接写出满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff4ac5468f41fcae4b46934396f5b7c.png)
②直接写出方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e794e0e159abfaf00e303aa34ef8b3ab.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐3】材料一:如果四位数
满足千位数字与百位数字的差等于十位数字与个位数字的差,则称这个数为“等差数”,例如:3423,因为
,所以3423是一个“等差数”.
材料二:对于一个四位数
,将这个四位数
千位上的数字与百位上的数字对调、十位上的数字与个位上的数字对调后可以得到一个新的四位数
,记
.例如
,对调千位上数字与百位上数字及十位上数字与个位上数字得到4152,所以
.
(1)判断
是否是“等差数”,并求出
的值;
(2)若
,
都是“等差数”,其中
,
(
,
,
,
,
、
、
、
都是整数)规定:
,若
,求k的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5efae7345fa68115108bc0512006c40.png)
材料二:对于一个四位数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c57fa1248daf3c26a372af4df380c99d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a61f360e25a88e98757b635a872595e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb9d748b9b8b569bb7cb6c32bec180b0.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba928c0657f6fc174e95d0d858c1b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/081fad2749f3f201cf2c324c3d0dd190.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16153a04870c1fb9e553235b65af72e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f16a9796afc71f83dcab3027c9d314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e546d27d099d383c2abff1f46139824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d52d516f6a8e116046c7f0b845c20f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6fe0a044511f71c14c4a710f358581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38feadc4efe892d22674ae5604d24702.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be19bb35cb8c10085e8dbceaea7bc4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e32fc32132cd3fb95f9b570d3806c9e.png)
您最近一年使用:0次