1 . 成都市为迎接2022年世界大学生运动会,需规划公路自行车比赛赛道,该赛道的平面示意图为如图的五边形
,根据自行车比赛的需要,需预留出
,
两条服务车道(不考虑宽度),
,
,
,
,
为赛道,
,
,
,
.注:
为千米.
![](https://img.xkw.com/dksih/QBM/2021/7/27/2773464684183552/2775955893829632/STEM/469aa52c9ba54c88bad18e6bd46594df.png?resizew=208)
(1)若
,求服务通道
的长;
(2)在(1)的条件下,求折线赛道
的最长值(即
最大).(结果保留根号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b496737614e6d3b823e5a28f245c4636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d8332bf70ea360b452b85e20a7d081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5195a231802caa64e45806f233ac2d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635f7d1535df78e526a904b627e43ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fe30c67ac20cd4e8b9cc2d0d420a7b.png)
![](https://img.xkw.com/dksih/QBM/2021/7/27/2773464684183552/2775955893829632/STEM/469aa52c9ba54c88bad18e6bd46594df.png?resizew=208)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aaf727cca163a124d70f055f3cb45dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)在(1)的条件下,求折线赛道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cfda5a702b4667cf789a826677a1e20.png)
您最近一年使用:0次
解题方法
2 . 在
中,角
的对边分别为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/c808a7e3-f657-4bb2-afc3-e8beffd8edc8.png?resizew=232)
(1)已知
,且 (在①
,②
,③
,这三个条件中任选两个补充到横线上),求
;
(2)若
,
,
与
交于点
,过
的直线分别交线段
于
两点,设
,
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95d62b9a1fc994c972781c7013fedba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46d2380152e6efc40909dad0ae96c12.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/c808a7e3-f657-4bb2-afc3-e8beffd8edc8.png?resizew=232)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c05e0b24aa92137350a194a062b9727c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2f1318b4bb40a1ec855834ec7e61f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a36ec31cfd615abfbee3ed2f4a1d8883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f57770796a401eef8d7144a98a42ab43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f78e25ebfe9c30ad05fbf224ca32118.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13c0c473e41134024b3f40612d320df.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b5126cbc748e852c2c39ca0ed232aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d4cadeffffd9480a95a17109570dca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b999f0d44be7a9d3aa85a0d41a1a4dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9912589c7030e0226dacc5596a5605dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaacfaef44a654c0a1c283ef03fc0550.png)
您最近一年使用:0次
名校
解题方法
3 . 如图在
中,
,
,
,点
在边
上,点
在
的延长线上,
交
于
,设
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/55066dd0-c79e-42fa-95c2-494ae141bec7.png?resizew=195)
(1)若
,求
的最小值;
(2)若
与
面积相等,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a6f36741b86f464be362b12bac13d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f8f90945248cc2efad926c27f6b15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54c556458d8075aa2d133615725f8e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80fe1fdf6c1a18510973a1c3cae9356b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b318bd45da07ef4c8ddd386e03d595.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/55066dd0-c79e-42fa-95c2-494ae141bec7.png?resizew=195)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b9d5aaaceaa3ac514d17fcfefbf9b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28baa3ec1ef83511eff382dcc0c885be.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3677f2a2a1b4aef3a370a03db832366.png)
您最近一年使用:0次
2021-07-29更新
|
280次组卷
|
3卷引用:四川省眉山市2020-2021学年高一下学期期末数学(文)试题