如图所示,已知点
,一次函数
的图象与两坐标轴分别交于A,B两点,M,P分别是线段OB,AB上的动点,则
的最小值是( )
![](https://img.xkw.com/dksih/QBM/2020/12/9/2617485424287744/2621635942178816/STEM/608fa2d4-6bf4-43dc-a0f4-3e672f39cbcd.png?resizew=200)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f36374ce95a4945d0e58264c2b271f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812eed46a589bde8b7c78a81a8cf9b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ddeb7ce17137144641f061042c14fb.png)
![](https://img.xkw.com/dksih/QBM/2020/12/9/2617485424287744/2621635942178816/STEM/608fa2d4-6bf4-43dc-a0f4-3e672f39cbcd.png?resizew=200)
A.4 | B.5 | C.![]() | D.![]() |
20-21八年级上·山西太原·阶段练习 查看更多[4]
山西省太原市迎泽区太原师范学院附属中学2020-2021学年八年级上学期12月月考数学试题(已下线)专题1.13 《三角形的证明》专题练习(提升篇)-2020-2021学年八年级数学下册基础知识专项讲练(北师大版)四川省乐山市2020-2021学年八年级下学期期中数学试题(已下线)专题19.37 一次函数题型分类专题(最值问题)(培优篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(人教版)
更新时间:2020-12-25 09:14:53
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【推荐1】已知直线
:
与直线
:
都经过
,直线
交y轴于点
,交x轴于点A,直线
交y轴于点D,P为y轴上任意一点,连接PA、PC,有以下说法:①方程组
的解为
;②
为直角三角形;③
;④当
的值最小时,点P的坐标为
其中正确的说法个数有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/2019/4/13/2181679337381888/2183692240609280/STEM/285d48fe-90cb-4be7-88f8-56565f6aa76b.png?resizew=280)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe22d0cee40ad652466d25d9e7c9264.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75eafafb6345e342e9c3f3cbd3abf8b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
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A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图,在平面直角坐标系中,点A的坐标为
,点P为直线
上的动点,以
为边作等边
,则
的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/37c31971-81d9-46c7-9fdf-1458f44f7811.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f612078b0cdcf31f3c1afa8b0051c8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb60dd65c10abde3ba0e4a60132d34d9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/37c31971-81d9-46c7-9fdf-1458f44f7811.png?resizew=167)
A.4 | B.2 | C.![]() | D.![]() |
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【推荐1】如图,在长方形
中,
,
,点E是
边上一点,且
,连接
;①
;②当
时,
平分
;③
周长的最小值为15;④当
时,
平分
.其中正确的个数有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/28/abf84dce-97fe-4409-ad1d-b773182adc85.png?resizew=144)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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A.4个 | B.3个 | C.2个 | D.1个 |
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【推荐2】如图是一个正方体,小敏同学经过研究得到如下5个结论,正确的结论有( )个
①用剪刀沿着它的棱剪开这个纸盒,至少要剪7刀,才能展开成平面图形;②用一平面去截这个正方体得到的截面是三角形ABC,则∠ABC=45°;③一只蚂蚁在一个实心正方体木块P点处想沿着表面爬到C点最近的路只有4条;④用一平面去截这个正方体得到的截面可能是八边形;⑤正方体平面展开图有11种不同的图形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/6/b2241f23-055a-49ca-b349-a4c468f710d1.png?resizew=153)
①用剪刀沿着它的棱剪开这个纸盒,至少要剪7刀,才能展开成平面图形;②用一平面去截这个正方体得到的截面是三角形ABC,则∠ABC=45°;③一只蚂蚁在一个实心正方体木块P点处想沿着表面爬到C点最近的路只有4条;④用一平面去截这个正方体得到的截面可能是八边形;⑤正方体平面展开图有11种不同的图形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/6/b2241f23-055a-49ca-b349-a4c468f710d1.png?resizew=153)
A.1 | B.2 | C.3 | D.4 |
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【推荐1】如图,△ABC中,AC=DC=3,AD平分∠BAC,BD⊥AD于D,E为AC的中点,则图中两个阴影部分面积之差的最大值为( )
A.1.5 | B.3 | C.4.5 | D.6 |
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【推荐2】如图,在正方形
中,E为边
上一点,过点D作
,与
的延长线交于点F.连接
,与边
交于点G,与对角线
交于点H,
与
相交于点I.下列结论:①
;②
;③
;④若
,则
;⑤连接
,则
.其中结论正确的序号是( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/6a61ba8f-6b4f-456b-936b-ab1779da4ddc.png?resizew=164)
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A.①②④ | B.①②③⑤ | C.③④⑤ | D.①②③④⑤ |
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【推荐1】如图,半径为1的⊙O的圆心是坐标原点,P为直线y=-x+2上一点,过点P作⊙O的切线,切点为A,连接OA,OP.下列结论:①当△OAP为等腰直角三角形时,点P坐标为(1,1);②当∠AOP=60°时,点P坐标为(2,0);③△OAP面积最小值为
;④∠APO≤45°.其中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/319228ff-db16-4b79-959a-20867c78fc37.png?resizew=220)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/319228ff-db16-4b79-959a-20867c78fc37.png?resizew=220)
A.4个 | B.3个 | C.2个 | D.1个 |
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【推荐2】在平面直角坐标系中,点A坐标为
,点
坐标为
,则A,
之间距离的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd243fab0af865af67a2ab817e909cf5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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