材料3:一个四位数自然数
,若
满足各个数位上的数字互不相同,把它的千位数与百位数字之差记为
,十位数字与个位数字之差记为
,得到一个有序数对
.根据
所在平面直角坐标系中的象限,称
为“象限数”;例如:
,
,
,所以
,
是“一象限数”.
材料2:把一个四位数自然数
的千位数字和十位数字交换,百位数字和个位数字交换得到新数记为
,定义
.
(1)1476是_______象限数,最小的“四象限数”为______.
(2)已知
(其中
,
且为整数),
(其中
且为整数),若
中的
为3,
是“三象限数”,且
能被7整除,求
的所有可能取值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/d259822ab64b8626f3893b8432673358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d259822ab64b8626f3893b8432673358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e7a0b1c483339c175d0d4b1d2465944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223a61a22c9bfa9f79d48f0894543468.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9da7953e2eb7e1a999cde325fc25b2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e584f799ea554fc5533925ead4672501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0954e71f5ba243089e4e0921d5396337.png)
材料2:把一个四位数自然数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbe35541fc6e3ed7f43237a934f7021.png)
(1)1476是_______象限数,最小的“四象限数”为______.
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cfa588195d293f1b72fdb887327b663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6887fdb3bc565b5f4e400a5dc3cb197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ed081826d4582781dab08da4878dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9675445e55006bf79dd0185ced4800a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97f92b8ac2a54d317eb5feb264f3349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0bd12082ce24e18c529fa84936041b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95ba8adfb19e3f4d35a40031e7e6ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
更新时间:2022-07-27 20:02:45
|
相似题推荐
解答题-问答题
|
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名校
【推荐1】阅读材料并回答下列问题:当m,n都是实数,且满足
,就称点
为“爱心点”.
(1)判断点
是否为“爱心点”,并说明理由;
(2)若点
是“爱心点”,请求出a的值;
(3)已知p,q为有理数,且关于x,y的方程组
解为坐标的点
是“爱心点”,求p,q的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a16f11f31e24f5b6338810fc3972db18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98acabd7735cf7d6f7aa097917373548.png)
(1)判断点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1de9dca01064b9578f28be610bb341e4.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3606b03fa15df52cbb4221b0ceff88.png)
(3)已知p,q为有理数,且关于x,y的方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55bad9e1a5c1adfb64ded04d342a8ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeebe2d626de76ae34a1a42b62a1a3bd.png)
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【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“奇异数”.将一个“奇异数”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
的商记为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f484115a9df1b6060d6b14df85c6f38.png)
例如:
,对调个位数字与十位数字后得到新两位数是
,新两位数与原两位数的和为
,和与
的商为
,所以![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0227448c7e64b7aa0aa9654982013bf.png)
根据以上定义,完成下列问题:
(1)填空:①下列两位数:
,
,
中,“奇异数”有 .
②计算:
.
.
(2)如果一个“奇异数”
的十位数字是
,个位数字是
,且
请求出这个“奇异数”![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)如果一个“奇异数”
的十位数字是
,个位数字是
,且满足
,请直接写出满足条件的
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/2d0b71b8d2c183154221f717ce09077b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f484115a9df1b6060d6b14df85c6f38.png)
例如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bec1aa1218e765aaa4b78bae06b4261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d314c287aa376240f0ca41bd181f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5a0057cd97fe08fc27b5e0d0d14f7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0b71b8d2c183154221f717ce09077b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9279a368f81cb9d2dcfe6e81f1531d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0227448c7e64b7aa0aa9654982013bf.png)
根据以上定义,完成下列问题:
(1)填空:①下列两位数:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1834490aacbee800ed5721312f4be1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec714b7d7a203ecbcef9232ee7d40da.png)
②计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8edcc46590283018ce702e1bb7faf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32e6201e68598ce10dae380928d4ee3.png)
(2)如果一个“奇异数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897d8f6cf00391f1b3ff70432f0121b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8740459bfb00b142133149cbb10124c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)如果一个“奇异数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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/af4eaceca24b07db5081b292b6d7057c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐3】若一个四位自然数满足个位与百位相同,十位与千位相同,我们称这个数为“双子数”.将“双子数”
的百位、千位上的数字交换位置,个位、十位上的数字也交换位置,得到个新的双子数
,记
为“双子数”
的“双11数”.例如,
,
,则
.
(1)计算2424的“双11数”
______;
(2)若“双子数”
的“双11数”的
是一个完全平方数,求
的值;
(3)已知两个“双子数”
、
,其中
,
(其中
,
,
,
且
、
、
、
都为整数,若
的“双11数”
能被17整除,且
、
的“双11数”满足
,令
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7093538ecfb10a639b23863e7331a66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc5c13201a08405783b4624da8f7864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72b757531cc791e4b0a8a52aea748bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bbbfe487bb67440ecaaf2a4dbe2ecc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6258828a95407fd896dbea8c5c77322.png)
(1)计算2424的“双11数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d03e3263133d7a1b548933a66063e180.png)
(2)若“双子数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde5899ab8503b1da059bf37311bd819.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde5899ab8503b1da059bf37311bd819.png)
(3)已知两个“双子数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a06de11058b0a3550e2782bdd282b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836dff80afb95b1eb8f84dbf93fd66ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b7e47c3e4f8ebccf01b6e9df866430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef44496baeec23250f8bd229bae41de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669b9a32dbbf8810c5e9e69f28bac4d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c75009fdbf21e39e0a0a34fe52080fe.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57a8a584b9571c6c528786a217c4aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9711eed04af0df8610ffa1e6cf56188.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7baeecda686f133db90b222f42834937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9278c3a9b3e765bdc978aaa4b1c205e9.png)
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【推荐1】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)
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【推荐2】如图,在
中,
,
,
,
,动点
从点
开始出发,沿
的路径运动,且速度为每秒
,设运动的时间为
秒.
(1)填空:当
时,
(用含
的式子表示);
(2)经过几秒,
的面积等于
?
(3)当
为何值时,
是以
或
为底边的等腰三角形?
(4)直接写出当
为何值时,直线
把
的周长分成相等的两部分?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cd4a1c8087ef697d82b321a3331211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2fae188b381c5ba01b3d9d742c687dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cecac53293d8c460f0825e698423844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/5e7b95fb-92e3-47aa-93ca-eeb93c00e677.png?resizew=151)
(1)填空:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c87e5f823364ef9ceac3fb39ca89eab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11127f4a2b09c459af756f1d11994020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)经过几秒,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2cc5f8cec8c498aa12c99c04e1c97d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff05a1709a7d81ed4697e472dfdce1a.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(4)直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐3】李老师准备购买一套小户型商品房,他去售楼处了解情况得知.该户型商品房的单价是5000元/
,面积如图所示(单位:m,卫生间的宽未定,设宽为xm),售房部为李老师提供了以下两种优惠方案:
方案一:整套房的单价为5000元/
,其中厨房可免费赠送一半的面积;
方案二:整套房按原销售总金额的9.5折出售.
(1)用含x的代数式表示该户型商品房的面积及方案一、方案二中购买一套该户型商品房的总金额;
(2)当x=2时,通过计算说明哪种方案更优惠?优惠多少元?
(3)李老师因现金不够,于2019年10月在建行借了18万元住房贷款,贷款期限为10年,从开始贷款的下一个月起逐月偿还,贷款月利率是0.5%,每月应还的贷款本金数额为1500元(每月还款数额=每月应还的贷款本金数额+月利息,月利息=上月所剩贷款本金数额×月利率),假设贷款月利率不变,请求出李老师在借款后第n(
,n是正整数)个月的还款数额.(用n的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d7b4bb12628d5ed455d814b8aafa1f.png)
方案一:整套房的单价为5000元/
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d7b4bb12628d5ed455d814b8aafa1f.png)
方案二:整套房按原销售总金额的9.5折出售.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/c0a830c9-b53a-4db3-9eb2-499f01b493bc.png?resizew=189)
(1)用含x的代数式表示该户型商品房的面积及方案一、方案二中购买一套该户型商品房的总金额;
(2)当x=2时,通过计算说明哪种方案更优惠?优惠多少元?
(3)李老师因现金不够,于2019年10月在建行借了18万元住房贷款,贷款期限为10年,从开始贷款的下一个月起逐月偿还,贷款月利率是0.5%,每月应还的贷款本金数额为1500元(每月还款数额=每月应还的贷款本金数额+月利息,月利息=上月所剩贷款本金数额×月利率),假设贷款月利率不变,请求出李老师在借款后第n(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d0d42bd73c9ebd3df5913844b0c12f1.png)
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【推荐1】阅读材料,完成下列问题:
材料一:任意一个个位数字不为0的四位数x,都可以看作由前面三位数和最后一位数组成,交换这个数的前面三位数和最后一位数的位置,将得到一个新的四位数y,记
,例如:
,则
,则
,
材料二:如果一个正整数a是另一个整数b的平方,则称a是完全平方数,特别地零也是完全平方数.
(1)计算:
;
(2)若x的前三位所表示的数与最后一位数之差能被11整除,求证:p(x)能被11整除;
(3)若
,
(
均为整数),且
是完全平方数,求满足条件的
的最小值.
材料一:任意一个个位数字不为0的四位数x,都可以看作由前面三位数和最后一位数组成,交换这个数的前面三位数和最后一位数的位置,将得到一个新的四位数y,记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf74476664b2cc59e42047bc76e326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e872db006bc17831af83842a7472aaf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef7f067fea4d598f1cc842275e49f39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98127c856f3d3d7045b9ebd550ae2c0a.png)
材料二:如果一个正整数a是另一个整数b的平方,则称a是完全平方数,特别地零也是完全平方数.
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a551d17fab9500da7f64cfb1e59317e.png)
(2)若x的前三位所表示的数与最后一位数之差能被11整除,求证:p(x)能被11整除;
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4260de5cb1425054e7ef598416a052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db1aedf779df8170d0c98e402a2d931b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/079243f161414f753c212d32c2fddb23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6658b459e338cb4dd0b5db34e1d3a99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44bb9c7f10d97c48c974f831336a85b1.png)
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【推荐2】用代数式表示如图所示的阴影部分的面积S,并求当a=4,b=8时阴影部分的面积S的值.(π取3.14,结果保留一位小数).
![](https://img.xkw.com/dksih/QBM/2019/11/1/2324505927802880/2325567703285760/STEM/7ceb601405804e3a8d8901f85bd2a2ab.png?resizew=180)
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【推荐3】阅读材料,完成下列问题:
材料一:若一个四位正整数(各个数位均不为 0),千位和十位数字相同,百位和个位数字相同,则称该数为“重叠数”,例如 5353、3535 都是“重叠数”.
材料二:将一位四位正整数 M 的百位和十位交换位置后得到四位数 N,
.
(1)
___________;
___________;
(2)试证明任意重叠数 M 的
一定为 10 的倍数;
(3)若一个“重叠数”
,当 t 能被 7 整除时,求出满足条件的所有 t 值中,
的最小值.
材料一:若一个四位正整数(各个数位均不为 0),千位和十位数字相同,百位和个位数字相同,则称该数为“重叠数”,例如 5353、3535 都是“重叠数”.
材料二:将一位四位正整数 M 的百位和十位交换位置后得到四位数 N,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b0e2e46bf5c88f2587eafdcf468877.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c79387d8307e9dab5b42245734aa1c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432266da27b85af6081e84f7d7f98379.png)
(2)试证明任意重叠数 M 的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86a7f68370511906270d4508d45cb36.png)
(3)若一个“重叠数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b17f65da1c876fb7870ca6c7a77eb09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d69e7fb25c60ee47440a1ece037544.png)
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【推荐1】阅读以下文字并解决问题:
对于形如
这样的二次三项式,我们可以直接用公式法把它分解成
的形式,但对于二次三项式
,就不能直接用公式法分解了。此时,我们可以在
中间先加上一项9,使它与
的和构成一个完全平方式,然后再减去9,则整个多项式的值不变。即:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d535b4314ea1b1ee95c7123250d03464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd3732a33c5204ebadd961d212339b.png)
,像这样,把一个二次三项式变成含有完全平方式的形式的方法,叫做配方法.
(1)利用“配方法”因式分解:
.
(2)若
,
,求:①
,②
的值.
(3)如果
,求
的值.
对于形如
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3650cc1c3d7020a02834fbd481944b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a5e5a12836ebd998616e14b9ec0bf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d166fe02ddbed051c96d458f6fa344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d166fe02ddbed051c96d458f6fa344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0db09eb5459716d971037a93e8d43379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d535b4314ea1b1ee95c7123250d03464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd3732a33c5204ebadd961d212339b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bcfccc0719de984435673ae7c7b7067.png)
(1)利用“配方法”因式分解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/230b17bdaf6806b2a3f1b3898c9140e0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289295fad0d1c11fc74470e8bb0c6be0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097fdd635f5d699dc0d13cd765ad6bec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1802bb87610630d1e935fdca0c60d720.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4133a9ee3ec594a2ce5d076c9c021c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae24688d4c45aad43e9af0b7bbfda6b.png)
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