题型:解答题-问答题
难度:0.4
引用次数:555
题号:19589272
我们定义:使方程(组)与不等式(组)同时成立的未知数的值称为此方程(组)和不等式(组)的“梦想解”.
例:已知方程
与不等式
,方程的解为
,使得不等式也成立,则称“
”为方程
和不等式
的“梦想解”
(1)已知①
,②
,③
,试判断方程
解是否为它与它们中某个不等式的“梦想解”;
(2)若关于x,y的二元一次方程组
的解是不等式组
的梦想解,且m为整数,求m的值.
(3)若关于x的方程
的解是关于x的不等式组
的“梦想解”,且此时不等式组有7个整数解,试求m的取值范围.
例:已知方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35557d92bc29cd0b5b8cb352a5cc02ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d314f8771046da1298311369ad35232d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35557d92bc29cd0b5b8cb352a5cc02ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d314f8771046da1298311369ad35232d.png)
(1)已知①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5026cd612a5cf5ee61f6c306405a4354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c31a6f961fe8a5e05ccaf6da8848068.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0edaf1bfbaf70ea0435993e52adee4e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc910a1de3a2b876d303511ae6d1e13.png)
(2)若关于x,y的二元一次方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6cd1b1ca973dcc854c27b1882d58a20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dabe77caef017b88cc54b4882d9947f9.png)
(3)若关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c5619b87f63559d1d61d08b20c3e5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc18865031ec0fb38386023f3b74757c.png)
更新时间:2023-07-10 10:44:37
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解答题-问答题
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较难
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【推荐1】如图1,已知直线
,
,射线
从
出发,绕点
以每秒
度的速度按逆时针方向旋转,到达
后立即以相同的速度返回,到达
后继续改变方向,继续按上述方式旋转;射线
从
出发,绕点
以每秒
度的速度按逆时针方向旋转,到达
后停止运动,此时
也同时停止运动.其中
,
满足方程组
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/7b0b0961-f2a5-4d74-95ee-a57433f63a71.png?resizew=179)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/1ffbd6cd-1335-448c-a464-cb8ac8237809.png?resizew=186)
(1)求
,
的值;
(2)若
先运动30秒,然后
一起运动,设
运动的时间为
,当运动过程中
时,求
的值;
(3)如图2,若
与
同时开始转动,在
第一次到达
之前,
与
交于点
,过点
作
于点
,交直线
于点
,则在运动过程中,若设
的度数为
,请求出
的度数(结果用含
的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12994211042ae102e8823a69b44c61f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360496a4f5cc8a5faca5e089ae4f9531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c023f4b501684abd869b36d6e6c7f21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279563c3c055777ce1aa369a2ef54aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.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/ca43ed9efb1d4e3b84a9b0de955ddc32.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/7b0b0961-f2a5-4d74-95ee-a57433f63a71.png?resizew=179)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/1ffbd6cd-1335-448c-a464-cb8ac8237809.png?resizew=186)
(1)求
![](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/360496a4f5cc8a5faca5e089ae4f9531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8332f1ae4f92d90607e9485134931da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360496a4f5cc8a5faca5e089ae4f9531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360496a4f5cc8a5faca5e089ae4f9531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e09561b0b32ebb8078c5817caa2f099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b773bfd5555285484e48c83f6e4fa13f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】规定:若
是以
为未知数的二元一次方程
的整数解,则称此时点
为二元一次方程
的“理想点”.请回答以下关于
的二元一次方程的相关问题.
(1)已知
,请问哪些点是方程
的“理想点”?哪些点不是方程
的“理想点”?并说明理由;
(2)已知
为非负整数,且
,若
是方程
的“理想点”,求
的平方根;
(3)已知
是正整数,且
是方程
和
的“理想点”,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fe8d6ceb1175bdbf6936ff67fa2990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fe8d6ceb1175bdbf6936ff67fa2990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce17494e52cc29acb63658db69a5569b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30e59c3c2a6538f463a78481bd006d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30e59c3c2a6538f463a78481bd006d8.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502e0dfa3f0e38017cd23a3d55b84840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8437f913a9f6cb98484b83ba08d7ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b8d3564d7ae5687f69b64b150c4b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55db12bc9a3b7bd2e6decaaea6ba387e.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ceec4b56e0743426ce72c3fc50c0333.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐3】在平面直角坐标系中,我们规定:点P(a,b)关于“k的衍生点”P′(a+kb,a+b﹣ka),其中k为常数且k≠0,如:点Q(1,4)关于“5的衍生点”Q′(1+5×4,1+4﹣5×1),即Q′(21,0).
(1)求点M(3,4)关于“2的衍生点”M′的坐标;
(2)若点N关于“3的衍生点”N ′(4,﹣1),求点N的坐标;
(3)若点P在x轴的正半轴上,点P关于“k的衍生点”P1,点P1关于“﹣1的衍生点”P2,且线段PP1的长度不超过线段OP长度的一半,请问:是否存在k值使得P2到x轴的距离是P1到x轴距离的2倍?若存在,请求出k的值;若不存在,请说明理由.
(1)求点M(3,4)关于“2的衍生点”M′的坐标;
(2)若点N关于“3的衍生点”N ′(4,﹣1),求点N的坐标;
(3)若点P在x轴的正半轴上,点P关于“k的衍生点”P1,点P1关于“﹣1的衍生点”P2,且线段PP1的长度不超过线段OP长度的一半,请问:是否存在k值使得P2到x轴的距离是P1到x轴距离的2倍?若存在,请求出k的值;若不存在,请说明理由.
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【推荐1】已知关于
的不等式
的解集为
,求关于
的一元一次不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55be17356f4b6ffbab5c926e65cc77eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/748fb4c4c0c41b8ec9fa7d0183c592bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ac72bde50772ef31b4d81567eb02ba.png)
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【推荐2】对于有理数a、b,我们用符号
表示a、b两数中较小的数,如
,又
.
(1)直按写出
的值.
(2)已知
,当
时,求x的值.
(3)小明说“第(2)小题中c的值不可能是1”你认为他说得对吗?如果你认为他的观点错误,求当
时,x的值;如果你认为他的观点正确,求当
成立时,c的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bcf98ae4aff5b41b9356ee67ad9f562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a2c464ab1b35ab351302fb4bba7634.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc3ebbfb6ac35dcd633c7cbf3be95f00.png)
(1)直按写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98229c50e50f8d4b012182d52058d03c.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc17a4852e3f85c40ecc5b2d0c6a8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/239ea0e903fbb4c8ce04133b9969578c.png)
(3)小明说“第(2)小题中c的值不可能是1”你认为他说得对吗?如果你认为他的观点错误,求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc17a4852e3f85c40ecc5b2d0c6a8c3.png)
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【推荐1】如图,在平面直角坐标系中,直线
与
轴交于点
,与
轴交于点
,且
,若
为直线
上一点
______,
______,
______.
(2)①求
与
满足的数量关系为______.
②若
的面积大于
面积的
,求
的取值范围
(3)若
,
的面积为
.若关于
的不等式
有4个正整数解,直接写出
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7255cbfbc86408b7cd865e89e5de0fb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6991563453cd366d99513c393d1ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecec08e3fd23a572b7cbf89c429bbd4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90688751e58655291204fab149e744e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/5abf115faee4cdb2bbae6e2d1e01be3a.png)
(2)①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1715eb5bb98c2f856c8979b04e1125c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb4e3fa92e80510e5ae97286b066316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a566dabbd868626d158aea243706d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdc02f00cf00a6dfd88b53a90f1f7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21e0f35d5765abd80f0fdb17028cd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】如果一元一次方程的解是一元一次不等式组的一个解,那么称该一元一次方程为该不等式组的子集方程.
(1)在方程x﹣3=0①,2x+1=0②,x﹣(3x+1)=﹣5③中,写出是不等式组
的子集方程的序号: ;
(2)写出不等式组
的一个子集方程,使得它的解是整数: ;
(3)若方程x=1,x=2都是关于x的不等式组
的子集方程,求m的取值范围.
(1)在方程x﹣3=0①,2x+1=0②,x﹣(3x+1)=﹣5③中,写出是不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50c59995383c0875a1c93956c5f7fb1.png)
(2)写出不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44ca5644102cc9eab5428da2ad51fe0.png)
(3)若方程x=1,x=2都是关于x的不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db898b47de9f989790f518e3a9aba63b.png)
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