名校
1 . 如图,在凸四边形
中,
,
,
,
.设
.
![](https://img.xkw.com/dksih/QBM/2016/11/16/1573151326691328/1573151332982784/STEM/ec9df2404c3d495b8c3b41cf39a5121f.png)
(1)若
,求
的长;
(2)当
变化时,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b3bb79b07f60dec5c2ab1107da2ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07df5ad00c7959a7584f04eec20045f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27b8f4ddb7db4cba6754ae9dd4c1ea5.png)
![](https://img.xkw.com/dksih/QBM/2016/11/16/1573151326691328/1573151332982784/STEM/ec9df2404c3d495b8c3b41cf39a5121f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3609b3b292aa619b5c52d5ef9de5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
2016-12-05更新
|
1546次组卷
|
4卷引用:【全国百强校】江西省南昌市第二中学2019届高三第六次考试数学(理)试题
2 . 在
中,
,点
在边
上,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab15f71acf24a48b4ea4efac5f09b718.png)
___________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b6bef27de230acad352f25e954f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdba5e7de662f6a691f0d6fb57f9ffdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d6b7bff8b3015c1ff5102c251892723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab15f71acf24a48b4ea4efac5f09b718.png)
![](https://img.xkw.com/dksih/QBM/2014/9/17/1571856578494464/1571856584015872/STEM/d55a51558c4c4f1480d72994b343471e.png?resizew=144)
您最近一年使用:0次
2016-12-03更新
|
907次组卷
|
5卷引用:江西省赣州市南康中学2017-2018学年高一下学期第三次月考数学(理)试题
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