1 . 已知两个等差数列2,6,10,…,202和2,8,14,…,200,将这两个等差数列的公共项按从小到大的顺序组成一个新数列,则这个新数列的各项之和为______ .
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23-24高一下·上海·期末
解题方法
2 . 已知
的周长为18,若
,则此三角形中最大边的长为__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4d5f963c3485870c100b3f09c9346dc.png)
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解题方法
3 . 已知扇形的半径为
,弧长为
,若其周长为
,当该扇形面积最大时,其圆心角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b147632ceec8c5c6ed5fdea4a454521e.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b147632ceec8c5c6ed5fdea4a454521e.png)
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4 . 在锐角
中,
,它的面积为10,
,
,
分别在
、
上,且满足
,
对任意
,
恒成立,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345078b37bdf02f53100140507c85bde.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6168bceb8119e8e2290ccc35b6ccc0e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc57614c316ede4c0a0ab3d533e21bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721fc29059eafb153d24020dbaefee29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd59a5621e55f43dd7e78aa7cbfaffae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f370a1d4dd341e5ab1774a66c66c1204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345078b37bdf02f53100140507c85bde.png)
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23-24高一下·上海·期末
解题方法
5 .
三内角
,
,
所对边的长分别为
,
,
,设向量
,
,若
,则角
的大小为 ______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090904da70d76c97b787bc44948f215d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac6107483a497c9ee9e2d4ac298ec0a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb83fac351156d4447cdca7cbd07c194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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6 . 已知
,
,若
,则
的最小值为__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd0914dc4d4c7f75710ff460a286fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/254aebe3ef7eabdf41e46c1cd857c705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df852e5c8d439fbf69f83fa9e080a638.png)
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7 . 记等差数列
的前
项和为
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554e6c461ccc5aa3093c524aa528a4e2.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ba58bbd886450561d3104017aada2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554e6c461ccc5aa3093c524aa528a4e2.png)
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8 . 将正整数
分解为两个正整数
、
的积,即
,当
、
两数差的绝对值最小时,我们称其为最优分解.如
,其中
即为20的最优分解,当
、
是
的最优分解时,定义
,则数列
的前2024项的和为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baf9e95e555b69df69a2bbc2ed86244.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0337976ed56157fdfdb4ad0d5083f87a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355bc0d6058a3dd1254ff395176ec55b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a46ca6d6012da9e32aacb4103129f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17236c6316d598e9804f5eab3cbef9f7.png)
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9 . 在
中,
,
,
,则
的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5a64bcb77f5f64e4af6930c249a270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1ca6d381ca573077f690836c551eef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2c414f5e5749d2da96f8beb92370921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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10 . 著名的费马问题是法国数学家皮埃尔德·费马(1601-1665)于1643年提出的平面几何极值问题:“已知一个三角形,求作一点,使其与此三角形的三个顶点的距离之和最小.”费马问题中的所求点称为费马点,已知对于每个给定的三角形,都存在唯一的费马点,当
的三个内角均小于
时,则使得
的点
即为费马点.已知点
为
的费马点,角A、B及C的所对边的边长分别为a、b及c,若
,且
,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1eab88a16df610f20dd46a44ba098d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83412830da88058dff4cd45cff08cc6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ea76be945fb82e74574e732809f968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056b0efe43f8f77c897ea271e0aa325d.png)
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