1 . 定义:记
为
这
个实数中的最小值,记
为
这
个实数中的最大值,例如:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8774803290fd7e2b8e5aaded3878e87.png)
,
.
(1)若
,求
、
的值;
(2)已知
,求
的最小值;
(3)若
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/956a34a1f40a8e5ca429db56154a1302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe1c31a81f198c443e71b83ca662939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5492f8c6f6ffc3412d316727333a940a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe1c31a81f198c443e71b83ca662939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8774803290fd7e2b8e5aaded3878e87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2b3b0ca12bc39549b0c3843c1dee61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a6be5ce078006dc2e59d419359e171f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b191787f1c8f50f09fcfdd4f54ad58a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54b6a060d6c51a328341df76013bd89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e1a1611f320c0f358df77aaae3f942.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b6487aab21104fcbe96f0ed5675c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db2887bd776156165be9e747cf43b4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
您最近一年使用:0次
2 . 已知正数
满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f667572aa90b314716d93d77b64bfb.png)
您最近一年使用:0次
名校
3 . 已知
,试求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a31c4a4cedc3088d78a01ed4928a981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
您最近一年使用:0次
2019-01-28更新
|
591次组卷
|
2卷引用:2018年全国高中数学联赛河南省预赛
4 . 定义在
上的函数
满足:
,且对任意
,有
.求最小的实数
,使得对任意
,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e11f4ca0e7ace69f92130d0525bcdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aeb3ca8cbc4facb2467b1a618f33794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5937884ea00c8d287790f6b5e9bcfd6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1cd9b780602fac532153308d4624433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f340711dae6f3f14550b6d5021ea9839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72359bf044d45b90187a128c6771cf5.png)
您最近一年使用:0次
5 . 自然数
、
使得
与
均为11的倍数,且
.求
的最小值.
![](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/d8b24fb641ad3f19c7f3e1feca7e4323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed06e649b1c75a92984ce7927c25de42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/133f4b96042db94eba882c741b0ecbfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208032c499fca4672caf07468d04b595.png)
您最近一年使用:0次
6 . 当
时,求函数
的最小值
的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2213d0bec9556471ac4a265b02f9d4f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b3ae7e5228fd1acb0d46f6941143a7.png)
您最近一年使用:0次
7 . 已知
.分别求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3fc026555a666e52bf39e923c3f6cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9e8c0f35fd1d7d47399714eeebf7541.png)
您最近一年使用:0次
8 . 设
四点均在双曲线
的右支上.
(1)若
(实数
),证明:
(O是坐标原点);
(2)若
,P是线段AB的中点,过点P分别作该双曲线的两条渐近线的垂线,垂足为M、N,求四边形
的面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4594a9943a8ab0ff38abef9af7ba37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e06289aa19b479a693110d0a6c22fb6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfde0625124e356c8df9f5c3a85786b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd75b1ffdc667e1d9d37f8c73bc14d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b2d03e9a74ce2db2ad792f9ced3ab3d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b0f0fef9c1b70d1d66b07e9af3891f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013ab2607569ae5da929b434ef5dedc1.png)
您最近一年使用:0次
9 . 已知正整数
,设长方形
的边长
,
,边
、
、
上的点
,
…,
,
,
…,
,
,
,
,…,
分别满足
,
,
.
(1)对于
,2,…,
,求
与
、
与
的交点所在的二次曲线
的方程;
(2)若
的延长线上的点
,
,…,
满足
,对于
,2,…,
,求
与
的交点所在的二次曲线
的方程;
(3)设在二次曲线
上到
的距离最大的点为
,求
与二次曲线
上的点的距离的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0fee7283a714563ad255f3ef9ac1a30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4217f4375caaeef4d4221143d5f6bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6c09cbb7a3d54240e7fb471e2cc910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d1ed7b41a0c528016c5ab39b60e54b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a86380a6d6501f6504dcb4aa5e3099f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae863e7a1f1fed09f1075de4a817c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7bd10df6ed5bc36fe7c3e2f3ac72387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3927480bd73c3be284c824698f403ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efc18a5bb2e53586331b2a58538a48b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f20f21a9d50b61dac519a3ddab539d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eafa98abbf61777850b346042f1c27b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29585d220a7500cdab45ee500b1dfa0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1d6e63a68f93d904edc76c50266dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3120b6b3d2646254c3d241c1112b09e3.png)
(1)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45176df950dfe48b8ca7eac08ee349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de3213b82fe46ff4d1bffcd1a07a01e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a9e8c5bf9e3996ffc54823510c0eb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/014d0f588f4a7cd09e020360a0906329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c33bb565362e823bf5ef7a8f8c4cb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82a5421934348a612982ca099723b63.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbf80835fc6bc33cf4f2db21474060a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45176df950dfe48b8ca7eac08ee349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de3213b82fe46ff4d1bffcd1a07a01e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb018007fa51deedd6e5253c3338a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4455cb5ef8fa02f8740a01ea658ed7fb.png)
(3)设在二次曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82a5421934348a612982ca099723b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4455cb5ef8fa02f8740a01ea658ed7fb.png)
您最近一年使用:0次
10 . 设
,
,且
.试求
的最大值及此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f45fd81fcd56034fad682a3c780961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861d897484c23dabd85fb4834f87a726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdde6d2fe18ce1031f40015b676e3205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc430227526f3a56d92d299593bacd1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f2e6d04fb58d4af1f1aefd29d61378.png)
您最近一年使用:0次