设x,y都表示有理数,定义一种新运算“
”;当
时,
;当
时,
.
(1)请根据这种新运算定义计算:
________,
________.
(2)若实数a,b满足
.
①请直接写出a,b的值.
②求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3c2f679d53b91088ba6eb14c16cbc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2c5cd1a25423c609b5b78f11104c57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7766d5158e0c0f4f7a3a65deaccabb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a5abe56c019ac914e1fcde1865a747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1854ca7ed30ff8c891ddf06254da48c6.png)
(1)请根据这种新运算定义计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381cb21a3dafd82096b12b13774b06f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fcb0f1dc142ea0cecddb60449e1b702.png)
(2)若实数a,b满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b2cb415efb2e2e3379d3f0204e9bed.png)
①请直接写出a,b的值.
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1441418e8706c36d0fab8696679ed989.png)
更新时间:2023-12-11 11:01:11
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图1,在数轴上有A和B两点,其中点A在数轴上对应的数为a,点B对应的数是b,点B位于点A左侧,并且a和b满足关系式:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/d06b9faa-1341-49f8-8a45-62c115d1d990.png?resizew=549)
(1)求线段
的长度;
(2)动点P从点A出发,以每秒3个单位长度的速度沿数轴向左匀速运动:
①若同时动点Q从点B出发,以每秒2个单位长度的速度沿数轴向左匀速移动,则经过几秒后,P、Q两点相遇.
②如图2,若定点C在数轴上对应的数为5,其他条件不变,当
时,求此时点P运动的时间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f5c592f0536e222c564ca5312f46e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/d06b9faa-1341-49f8-8a45-62c115d1d990.png?resizew=549)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)动点P从点A出发,以每秒3个单位长度的速度沿数轴向左匀速运动:
①若同时动点Q从点B出发,以每秒2个单位长度的速度沿数轴向左匀速移动,则经过几秒后,P、Q两点相遇.
②如图2,若定点C在数轴上对应的数为5,其他条件不变,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e7a8efca63928bf96889108577726a.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图1在平面直角坐标系中,
、
,
满足
,
为
的中点,
是线段
上一动点,
是
轴正半轴上一点,且
,
于
.
(1)求
的度数;
(2)如图2,设
,当点
运动时,
的值是否变化?若变化,说明理由;若不变,请求
的值;
(3)如图3,设
,若
,求点
的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/e5bcd5ee-4ca7-4e69-95ac-abce62631667.png?resizew=399)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c09615735d331befd07664aa47cb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89665b55e3b6275405e709c2c57bcec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637541af30c2caad516963ba2dad3d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3daae8ec60b2b1f7577dee687247cebb.png)
(2)如图2,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
(3)如图3,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48d96fbe995310aa5700fc5ec3e785f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/e5bcd5ee-4ca7-4e69-95ac-abce62631667.png?resizew=399)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】先填空,然后补写一个有同样特点的式子.
(1)1×(-7)-1=_________,
12×(-7)-2=_________,
123×(-7)-3=_______.
__________________________.
(2) 9×(-9)+1=___________,
98×(-9)+2=_________,
987×(-9)+3=_________.
__________________________.
(1)1×(-7)-1=_________,
12×(-7)-2=_________,
123×(-7)-3=_______.
__________________________.
(2) 9×(-9)+1=___________,
98×(-9)+2=_________,
987×(-9)+3=_________.
__________________________.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】一个四位数
(其中
,
,
,
,且均为整数),若
,且
为整数,称
为“
型数”.例如,
:
,则
为“
型数”;
:
,则
为“
型数”.
(1)判断
与
是否为“
型数”,若是,求出
;
(2)若四位数
是十位和百位数字相同的“
型数”,
是“
型数”,求满足条件的所有四位数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7772099d92a2ece88d8e4b28f3b74223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40654a0135a2713cfe30a53445cbe7c.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/03bab33097e190d6169262a00d23939b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff04860a78f0d0ae6d0507de974ad092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a963dd4eacf85738ffe26457fbc91ae3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a22db6382d284d6c8c2aef245bbd27b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a963dd4eacf85738ffe26457fbc91ae3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77641d0931fbfd52c6ab8f1dbfb725de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7c135fa54fdf2d0aaf9a1d4a040bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77641d0931fbfd52c6ab8f1dbfb725de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8123e430860717e237496c6a13b2763d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e55f52a614aa8ac4e96591234ed4d37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若四位数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c58ad2943ac43e6a8a0193eaf9fd8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在平面直角坐标系中,
,
,其中a,b满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/192d48f8-82f8-4958-b0b9-0ea422ce5833.png?resizew=208)
(1)求a,b的值;
(2)在第二象限内有一点
,请用含有m的式子表示四边形ABOM的面积;
(3)在(2)的条件下,当
时,在坐标轴上是否存在点N,使得
的面积等于四边形ABOM的面积?若存在,请直接写出点N的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/296c31eaede57efe89ffb83f02ad4622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5612d598e27ac2ce0ab89fb63538bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58f1e575b0b287a4a35db2a23f707231.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/192d48f8-82f8-4958-b0b9-0ea422ce5833.png?resizew=208)
(1)求a,b的值;
(2)在第二象限内有一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8ed6d55fd6954b5a6f085505f2cf26.png)
(3)在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed39f5aca78934fb383402433fe549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7ad41b36674fd6e90176ee24cdefbb.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐3】如图1,在平面直角坐标系中,O为坐标原点,OA、OB、AB的长分别为a、b、c,且满足
,点P从A出发,以每秒1个单位的速度沿射线AO匀速运动,设点P运动时间为t秒.
(1)A的坐标为_________,B的坐标为_________.
(2)如图2,连结BP,当t为何值时,BP平分∠ABO.
(3)过P作PD⊥AB交直线AB于D,交y轴于Q,在点P运动的过程中,是否存在这样的点P,使
POQ与
AOB全等?若存在,请求出t的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3115d9bc1d3d54cb65bf19bfb8f94d22.png)
(1)A的坐标为_________,B的坐标为_________.
(2)如图2,连结BP,当t为何值时,BP平分∠ABO.
(3)过P作PD⊥AB交直线AB于D,交y轴于Q,在点P运动的过程中,是否存在这样的点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2021/11/8/2846838823821312/2849845328723968/STEM/0b635b37-d539-4a56-886e-578e9ef0cd52.png?resizew=502)
您最近一年使用:0次