名校
解题方法
1 . 如图,在平行四边形
中,
为
的中点,
与
交于点
.
![](https://img.xkw.com/dksih/QBM/2022/4/25/2965923684057088/2969116894298112/STEM/afef23b56935496b9cf1b8a65bf0ee5b.png?resizew=258)
(1)用
表示
;
(2)若
,四边形
的面积为
,
,试问
是否有最小值?若有,求出最小值;若没有,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/2022/4/25/2965923684057088/2969116894298112/STEM/afef23b56935496b9cf1b8a65bf0ee5b.png?resizew=258)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd19d458d51304d5b5709003af66e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472dfa1c1e44c00e58a4712c3dea4247.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27567d43c5b91382ee3d7ca708ee422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad72c81de9c2b3e114bd9de26b2ebbbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2836c5f53d54af99490f0cd48499b7.png)
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2022-04-30更新
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3卷引用:湖北省十堰市丹江口一中2021-2022学年高一下学期月考数学试题