已知非负数
,
,
满足
,
,设
的最大值为
,最小值为
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c960fc862fd36db83082f5c50cd604b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2640901f95e89ff5f80958a52236c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0295dede843950b9bb163a90d41544a.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/c9f2416d1f75a45a314331146550832e.png)
A.6 | B.5 | C.4 | D.![]() |
22-23九年级上·江苏宿迁·期末 查看更多[4]
江苏省宿迁市泗洪县2022-2023学年九年级上学期期末数学试题安徽省六安市清水河学校2023-2024学年九年级上学期期中数学试题(已下线)清单10 二次函数的图象与性质(2个考点梳理+18种题型解读+提升训练)-2023-2024学年九年级数学上学期期末考点大串讲(苏科版)(已下线)专题10 二次函数(十二大题型)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(山东专用)
更新时间:2023-07-26 16:56:20
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【推荐1】根据图中数字的规律,则x+y的值是( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/151c770c-d1a9-46e4-9cd3-e89ebe643c85.png?resizew=480)
A.729 | B.550 | C.593 | D.738 |
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【推荐2】有依次排列的两个整式
,
,用后一个整式B与前一个整式A作差后得到新的整式记为
,用整式
与前一个整式B作差后得到新的整式
,用整式
与前一个整式
作差后得到新的整式
,依次进行作差的操作得到新的整式.下列说法:①当
时,
;②整式
与整式
结果相同;③当
时,
;④
;其中,正确的说法有( )个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6358c71f84359dac9dab9bb795e13224.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
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A.4 | B.3 | C.2 | D.1 |
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【推荐1】已知
、
、
满足
,
,且
、
、
都为正数.设
,则
的取值范围为( )
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840cc89466adef4d682d6287beada456.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】对于任意实数,通常用
表示不超过x的最大整数,如:
,
,
,给出如下结论:①
;②若
,则x的取值范围是
;③当
时,
的值为1或2;④若
且
,则x的取值范围为
.其中正确的结论有( )个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f5c0bae0d414922e9c805eaa022839.png)
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A.1 | B.2 | C.3 | D.4 |
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【推荐1】如图,已知
的弦
,A为
上一动点(点A与点C、D不重合),连接
并延长交
于点E,交
于点B,P为
上一点,当
时,则
的最大值为( )
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A.4 | B.6 | C.8 | D.![]() |
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【推荐2】如图,在等腰中,
,
,
是
边上的中点,点
、
分别在
、
边上运动,且保持
,连接
、
、
,在此运动过程中,下列结论:①
是等腰直角三角形;②
与
不可能全等;③四边形
的面积保持不变;④
面积的最大值为18,其中正确结论的个数是( )
A.1个 | B.2个 | C.3个 | D.4个 |
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