(1)若
的小数部分为a,5
的小数部分为b,求ab
(2)已知a、b、c在数轴上的位置如图所示,化简![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02ad425f6bc36cb3c75a9a517cfa54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
(2)已知a、b、c在数轴上的位置如图所示,化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02ad425f6bc36cb3c75a9a517cfa54f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/18/ce90548c-c035-45a3-befd-25a6442c2afc.png?resizew=231)
更新时间:2020-04-17 21:29:39
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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,在平面直角坐标系中,已知点
,点
,其中a,b满足a是
的整数部分,在数轴上,b表示的数在原点的右侧,离原点的距离是4个单位长度.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/a5913f4d-2cb2-41e6-9943-6a0c0e664cd0.png?resizew=416)
(1)求A点的坐标 ,B点的坐标 ;
(2)将
平移到
,点A对应点
,点B对应点
,求三角形
的面积;
(3)如图2,若C,D也在坐标轴上,过点D作射线
轴,P为射线
上一点,连接
,
平分
交
于F点,
交
于E点,
的值是否改变?若不变,求出其值;若改变,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/d4056761b8f826eeb6ad8c9a151d3c9c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/a5913f4d-2cb2-41e6-9943-6a0c0e664cd0.png?resizew=416)
(1)求A点的坐标 ,B点的坐标 ;
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94bcad53e9a8c8e070efa2c1a1e8f1be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(3)如图2,若C,D也在坐标轴上,过点D作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b84f635e69dfc10ab95ffad410088b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f5dc1d043a4909a40238ff5b590c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0acc3b50b12699a4a9a4cc391b8f5bcf.png)
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【推荐2】已知3+
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解答题-计算题
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较难
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名校
解题方法
【推荐3】阅读下面的文字,解答问题.
对于实数a,我们规定:用符号[a]表示不大于a的最大整数;用{a}表示a减去[a]所得的差.
例如:[
]=1,[2.2]=2,{
}=
﹣1,{2.2}=2.2﹣2=0.2.
(1)仿照以上方法计算:[
]= {5﹣
}= ;
(2)若[
]=1,写出所有满足题意的整数x的值: .
(3)已知y0是一个不大于280的非负数,且满足{
}=0.我们规定:y1=[
],y2=[
],y3=[
],…,以此类推,直到yn第一次等于1时停止计算.当y0是符合条件的所有数中的最大数时,此时y0= ,n= .
对于实数a,我们规定:用符号[a]表示不大于a的最大整数;用{a}表示a减去[a]所得的差.
例如:[
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)仿照以上方法计算:[
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
(2)若[
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f457e696b1504bfb73140699a8e18dd0.png)
(3)已知y0是一个不大于280的非负数,且满足{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53890c6a2c2be3aec1d4b852e99d07bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53890c6a2c2be3aec1d4b852e99d07bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ffb69ec4720133887ec9a76e1a4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/843fffc074b0239e76fdaaf0d8dab20e.png)
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解答题-证明题
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较难
(0.4)
【推荐1】已知正方形
的对角线
交于O,M是
上一点.
(1)如图1,
于点N,交
于点Q.
;
②若
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的值.
(2)如图2.M是
的中点,线段
(点E在点F的左边)在直线
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,若
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的最小值是______,当
取得最小值时
的长为______.
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(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77adc32125a75bb86597a92be3cc6110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87ab12c5898b8d5a61d5534f1df3e35.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152e1713bdf8c4cee88188b91fd7038e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8681f82f5299c14d229ecfc22155173b.png)
(2)如图2.M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f85721d7fe852b0a63adc360550ad2de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6469878a955cc09fac22ba5aea3fb962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4597d57f461825beec35ebfd2c378075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4597d57f461825beec35ebfd2c378075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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解答题-证明题
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较难
(0.4)
【推荐2】如图1,的各内角的平分线分别相交于点E,F,G,H.
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
①求证:四边形为正方形;
②若,四边形
的面积为6,求
的长.
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