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1 . 已知集合
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edff1881635893293dd411ead8194aca.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20286438324375659c671c26fa1cfdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/924972ab1392e09a7ba76c8c6d5f3125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a70d32c64918aa4d1d9d3ce0bdbf7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edff1881635893293dd411ead8194aca.png)
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2 . 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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3 . 函数
的定义域为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f06bbfc4508a9909143870fe503a10b7.png)
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4 . 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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5 . 如图,在平面斜坐标系
中,
,平面上任意一点
关于斜坐标系的斜坐标这样定义:若
(其中
分别是
轴,
轴正方向的单位向量),则
点的斜坐标为
,且向量
的斜坐标为
.给出以下结论,其中所有正确的结论的序号是_______
,
,则
;
②若
,则
;
③若
,则
;
④若
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ad4c21d0009cf8265361890308e056e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5253a9a71037d60059b60237824193b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10814bc3db929e79874befe96cf4e3d4.png)
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91174b2336306191ba275a87864172b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72bf0fce80daad394f2a9d013829c5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/879080beb1e55cae2639645cd64c4710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be815024e215a7804f07bfb7b902ee92.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455bae796d928c3c4d9090e924259628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492ec33a8a8fe343c808dad4d4048a27.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d97636c187bac63f85bbe7b4f037c9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b857b2449bceb2517aa97388f4d3b585.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3db266679b2b3fde243f74746e0e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143350baca29128763c3df934dc75608.png)
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6 . 已知函数
满足:
,
,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16704af7b9bb4aed550bf6f4a7c8c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34dfa076b49cdb3c67a8af047ddaec98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637c8af2e8daf81d84f4e67d2e8a404e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ecea32aa78d109540926e68823146c3.png)
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7 . 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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8 . 已知函数
,
,若对于任意
,存在
,使得
,则实数
的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd895c07978d213e56cba4f4da5ae02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d03bb05bb38675f02177d9188d48c79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a3163cc2d37e7b7fe450f6e8bf8500.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff565afbddafe8625ef376d7eb3fa649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032e8dc00cdc96860c9cbf8ac09677fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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9 . 若不等式
的解集为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5f6f8e0a7ce4adec4369a70fb08de5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7772d3f57c2b7fad74dc38bcec129efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
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10 . 满足
,
的角
的集合为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d447fcd65dcd7b3de73d46fa5fe68c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27794407a3d82a6746f7e0871051f486.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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