若一个四位数的千位数字与十位数字相同,百位数字与个位数字相同,则称这个四位数为“间隔四位数”,如
,
,
,…等都是“间隔四位数”,若将一个“间隔四位数”的千位数字与个位数字交换位置,百位数字与十位数字交换位置,得到一个新四位数,我们把这个新四位数叫做“原间隔四位数的对应数”,如
的对应数为
,
的对应数为
.
(1)任意写一个“间隔四位数”及它的“对应数”;猜想任意一个“间隔四位数”与它的“对应数”的差是否都能被
整除?并说明理由;
(2)一个“间隔四位数”的千位数字为
,百位数字为
(
,且
),若这个间隔四位数与它的对应数的差能被
整除,求这个“间隔四位数”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52e7f61488fdddfa2c4c4a655e76b6be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff6f4aeaa10e0cbaee31633d7e7d63e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d41c2a6f78d6e4325f3d718195a5472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52e7f61488fdddfa2c4c4a655e76b6be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57f46fcb3c173d91a654d32c7e57aaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724aee287a7e460934d9fe03abc12a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc95386143f3370ae6214d45b06aeff0.png)
(1)任意写一个“间隔四位数”及它的“对应数”;猜想任意一个“间隔四位数”与它的“对应数”的差是否都能被
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7070546e4014f28fb2eaed777ec1dff.png)
(2)一个“间隔四位数”的千位数字为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21fb156d1e3a475ca5bc87143bfd266f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e26026a4c162fa30379dfc14438f350.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37313b684f4ea9714c3f6df0053c603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad2ba418a6366f21c5c26ab95d04ed6.png)
更新时间:2022-12-07 12:38:13
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【推荐1】在山地和丘陵,气温随海拔升高而降低.大致每升高
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(3)张老师爬到山上某处看了一下随身携带的温度计,气温为
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(1)若山顶的海拔是
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(2)若山上某处的海拔是
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(3)张老师爬到山上某处看了一下随身携带的温度计,气温为
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【推荐2】已知数字
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(1)用含
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(1)用含
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a655d6935ae3f646e17ff72bc213e2.png)
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解题方法
【推荐1】观察算式:
;
;
;
,…
(1)请根据你发现的规律填空:
( )2;
(2)用含n的等式表示上面的规律: ;(n为正整数)
(3)利用找到的规律解决下面的问题:
计算:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51bb2ccc517925bcbbab14abed1c70b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92adf13cc2f9ecc1a56ee256a929b26e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e2df494fd7f2efb0c9b1eaa1d8e235.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504dbabab376f53e24499cfd2fdbcd83.png)
(1)请根据你发现的规律填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/534b5123cfcf2901e8078b304570c3c6.png)
(2)用含n的等式表示上面的规律: ;(n为正整数)
(3)利用找到的规律解决下面的问题:
计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f0ad3bc6c7416e8943315dd50463f43.png)
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【推荐2】探索规律:
观察下列各式及验证过程:
时,有式①:
;
时,有式②:
;
式①验证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0335aa4768c4c02c666c600962110f.png)
式②验证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fdd1b0ff5e6ec06e25a1fd75949c6b6.png)
(1)针对上述式①、式②的规律,请写出
时的式子;
(2)请写出满足上述规律的用
为任意自然数,且
表示的等式,并加以验证.
观察下列各式及验证过程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d030a2ac879b78b9786f3dfdea938c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871f15ed441c191980c851c31e8c1f7.png)
式①验证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0335aa4768c4c02c666c600962110f.png)
式②验证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fdd1b0ff5e6ec06e25a1fd75949c6b6.png)
(1)针对上述式①、式②的规律,请写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac3649308b528fd56545ba102dc42d5.png)
(2)请写出满足上述规律的用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede9197696187ece75627fdfcb1772e1.png)
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