解题方法
1 . 已知函数
.
(1)若函数
的定义域为
,且
,求实数
的取值范围;
(2)当
时,求证:对于定义域内的实数
,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091b5d37d2d4ff25fef3bf1946f9f3e3.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15baf5b3996a7bc85059a81cc42784ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61cb20f3ee136551daee66d1d68bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4aa539556add14df9b3fc68b9827464.png)
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2021-11-11更新
|
474次组卷
|
2卷引用:2021年浙江省温州市摇篮杯高一数学竞赛试题
2 . 四面体,又叫三棱锥,是一种简单多面体.指空间两两不相交且不共线的四个平面在空间割出的封闭多面体.它有
个面、
个点、
条棱、
个二面角.若一个四面体的四个顶点
,
,
,
.则可记为四面体
.对下列特殊的四面体,请选择正确得选项( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.若四面体![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
B.若四面体![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.各面均为直接三角形且有至少三条棱长为![]() ![]() |
D.若一个平面与正四面体相交得到一个钝角三角形,则该钝角总小于![]() |
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3 . 已知
为
的垂心,且
,
,
,
,则下列选项正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8b3e1c0dcf21de50396b123a170f379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dca3039c4c4dfd56a1c305316908da1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/865ff7887630863aa9d0ff5ca4190919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc7c08cd0772c4067a9faa5c2b9a8c3.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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名校
4 . 已知数
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91cf6f47f5311a0ebc049454619fd15d.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f950988f4d76515847ed79c947d283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9170f8030252b13cd57608d977de99aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91cf6f47f5311a0ebc049454619fd15d.png)
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5 . 已知正数x,y满足
,则
的最小值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/621b2209e9d7b7bc7c4fa2dda0742c37.png)
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2021-09-04更新
|
1707次组卷
|
7卷引用:浙江省杭州学军中学西溪校区2020-2021学年高一下学期3月计算大赛数学试题
名校
解题方法
6 . 已知函数
,则关于x的不等式
的解集是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ac0731ac516f7c45c497c990e75fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b723cf2c92aee923f490a09adbaee5.png)
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名校
7 . 已知函数
,则方程
所有根的和是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b6b83c95d195476f54a8e99115b149d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f280586018b5c722eab269ef7f571508.png)
您最近一年使用:0次
2021-09-04更新
|
367次组卷
|
2卷引用:浙江省杭州学军中学西溪校区2020-2021学年高一下学期3月计算大赛数学试题
名校
8 . 若不等式
,对
恒成立,则
和
分别等于_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a23ecdd038d0f51e5cc8e4f15467066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ba8d2141d285c963ec078fe2ce8686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba802d07a031953c822e1e5928a31f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94773f685ff8cbea3c06e02edf9eedb.png)
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解题方法
9 . 已知函数
,若函数
恰有8个不同零点,则实数a的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e217552575812257d9345312b7e698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86684bb6a19a61d8ab3e97689626be54.png)
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10 . 函数
的图象与函数
的图象关于直线
对称,当
,
的最大值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e49daff4a297647fb7e26a82f2a48af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d451353cb7bb3621735818df9debb69a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
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