1 .
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd8ec6fc551585f093d0a8848aace07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2829c117b291deabd43fdd524d253a26.png)
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2 . 若对一切
,都有
(a、b、
,
),试求函数
在
时的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c828e94cfd04e8be1e77bca1ec5db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e2367b2b1d0001f564542ef80f981d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9ca15de80717300c0518cd82b561cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e639f66c1cf038d5e198e06b7820419.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c828e94cfd04e8be1e77bca1ec5db8.png)
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3 . 已知
的三边长
,三内角为
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b102b36cba4c1868afcd7a591a796da.png)
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解题方法
4 .
为正实数,满足
,求
的最大值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751e274e9107d780c39ba9c49d6daefb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19cb3b888b46a0c5e62ccbb09bd77ba.png)
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解题方法
5 . 已知
的值域为
.
(1)求实数
的值;
(2)判断函数
在
上的单调性,并给出证明;
(3)若
,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be8c296dba4a6442f262437f6671c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2ec965488c7e1cea085463c7731285.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a475fec8ded321e10a6697319fb975.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4f3966052d4a779b6247fdf12f97cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf039c46a25e331446c6ee1e9af3c82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb85ae535f90b3c125d86b439ab2562.png)
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6 . 已知等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8430c0f580ff69646229842c38fab9.png)
(1)若
均为正整数,求
的值;
(2)设
,
分别是分式
中的
取
(
>
>2)时所对应的值,试比较
的大小,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8430c0f580ff69646229842c38fab9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e647c14561826ba9e396acc5a3792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e647c14561826ba9e396acc5a3792c.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6703fce72e701fd5d9be3e25448d9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9724cf149ccc974596673c8aaae9558f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e327c14ae50f0f10478a6c751c26fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff60eab72de85437e12806474281612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a550c916c64f621010e604a30ef67566.png)
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7 . 已知a,b,c为三角形的三边.
(1)求证:
;
(2)若
,求证:
.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/756084350ee839aa662bb1b39fa962db.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09cad84c1fa1dbfdc03fb5441c039a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b6d7b31981b8dc5e2ac863e5a25fda.png)
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名校
解题方法
8 . 对于空间向量
,定义
,其中
表示x,y,z这三个数的最大值.
(1)已知
,
.
①直接写出
和
(用含
的式子表示);
②当
,写出
的最小值及此时
的值;
(2)设
,
,求证:
;
(3)在空间直角坐标系
中,
,
,
,点Q是
内部的动点,直接写出
的最小值(无需解答过程).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b303ef66609858e8ab234b6dabccba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e382f70d741ee01c165391ce980155d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4461408813c1476a8a8073c83b8989.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23056c429159c0198f865ff11972d8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e17d2355419564f6d9737295412b58c.png)
①直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9873960d64934875139754efbdfe951d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af5f843689a63bc176c2d2171b6a1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53168695826b0a33a23067b76173c7e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780ef5119f58f853ce9dd2b9176ffdde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778ae4468d857c229073875e0ee0ce31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6772fa3937b97d9ec3aec1ea2ea143b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95086cc97ef93f5166489b3bc47e1911.png)
(3)在空间直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b32ab04dd852329d5918b177c199eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee736aec4313d04a5921ed7e5800b3b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d04a00e46c1ffb335f73506041c66dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084fc7655647b596d07e80269d086e5a.png)
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9 . 解不等式:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27ecb2babdf3944dad8bf58bf4e226d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beeb5d6b38112436a4a47cfa0bb57a15.png)
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20-21高一·全国·课后作业
10 . 已知关于x的不等式组无解,求a的取值范围;
您最近一年使用:0次
2023-10-25更新
|
44次组卷
|
8卷引用:2.2.2+不等式的解集(同步学案,)-新教材2020-2021学年高一数学同步备课(人教B版必修第一册)
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