更新时间:2017-09-09 09:30:43
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解答题-问答题
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适中
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【推荐3】如图1,在数轴上点
表示的数为
点,
表示的数为
,点
到点
的距离记为
.我们规定:
的大小可以用位于右边的点表示的数减去左边的点表示的数表示,即
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/7823a122-1c29-4f8f-bb4f-87f633816c4a.png?resizew=408)
请用上面的知识解答下面的问题:
如图2,在数轴上点
表示数
,点
表示数
,点
表示数
,其中
是最大的负整数,且
满足
与
互为相反数.
(1)
_____,
_____,
_____;
(2)若将数轴折叠,使得点
与点
重合,则点
与数_____表示的点重合;
(3)点
开始在数轴上运动,若点
以每秒
个单位长度的速度向左运动,同时,点
和点
分别以每秒
个单位长度和
个单位长度的速度向右运动,假设经过
秒后,
的值是否随着时间
的变化而改变?若变化,请说明理由;若不变,请求出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5506cc777df4d7ab72fd0adf0c9a209.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/7823a122-1c29-4f8f-bb4f-87f633816c4a.png?resizew=408)
请用上面的知识解答下面的问题:
如图2,在数轴上点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c029d4e6293ef2bb1cbd60a49214af65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715df406f7d701d210bfb74af09fdcf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbe0e95f0650ff24f63fcb9c3a7b0db.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
(2)若将数轴折叠,使得点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7af7c5df749c6fa9bbe87faa72c66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6262378cf7f03352cdb5da8936a748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6262378cf7f03352cdb5da8936a748.png)
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【推荐2】材料一:对于一个三位正整数,若十位数字与个位数字之和减去百位数字的差为5,则称这个三位数为“求真数”,例如:234,因为3+4-2=5,所以234是“求真数”;
材料二:若
(
,
,
且a、b、c均为整数),记
.
(1)判断345与519是不是“求真数”,并说明理由;
(2)已知
是“求真数”,且
能被13整除,求所有符合题意的A的值.
材料二:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee10d069c650bc483e6bfc644fb3f24e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6fe0a044511f71c14c4a710f358581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ed081826d4582781dab08da4878dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037f8ffecb7de509ad8e637d8077d7b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1deefbc9adeffe2c760f3d0a01240194.png)
(1)判断345与519是不是“求真数”,并说明理由;
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a037318a4bb16b6f851606ce953759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b62ac66c07dd04fda7e9923b295a8d.png)
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解答题-作图题
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【推荐1】对于两个有理数a,b,我们对运算“☆”作出如下定义:若
,则
;若
,则
.
(1)计算:
;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b0d3c3247fed978fcf575f4560fd20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1132de2e8913dba9c5cc2396ecb09fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24ff149d467ca2eb94e42c9f41e3f37.png)
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5b15d07fdf1c5976d802cebc41eb4fa.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3dab2ea0a4e9d206a8668c7797e991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1bf3f4a3cc5cc4c5bdb6bb87c5ee188.png)
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解答题-作图题
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【推荐2】在数轴上画出表示下列各数的点,并用“<”将这些数按从小到大的顺序连接起来:﹣22,﹣(﹣1),0,﹣3,﹣|﹣2|,﹣3
,(﹣2)2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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解答题-问答题
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【推荐1】在平面直角坐标系中,
,
,
,
.
(2)若点C在直线
上,求出点C的坐标;
(3)过点C作
的平行线交x轴于点D,交y轴于点E,若
,请直接写出m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64ab699685ceb40954d6b3165047b314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d34bd2e10b34e4149f6459b5ac5196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82d62fee781f70202f2495fbe1aaed3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1996ace2f852e919d8b9b6a3bbe011b5.png)
(2)若点C在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673a7242e9a17d12438d7eb1b97bd54f.png)
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解答题-问答题
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【推荐2】已知x、y满足
+|y﹣3x﹣1|=0,求y2﹣5x的平方根.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9fba7b0a4fbc939b4cd107a1f8a760.png)
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