已知函数
的定义域为(0,+
),若
在(0,+
)上为增函数,则称
为“一阶比增函数”;若
在(0,+
)上为增函数,则称
为”二阶比增函数”.我们把所有“一阶比增函数”组成的集合记为
1,所有“二阶比增函数”组成的集合记为
2.
(1)已知函数
,若
∈
1,求实数
的取值范围,并证明你的结论;
(2)已知0<a<b<c,
∈
1且
的部分函数值由下表给出:
求证:
;
(3)定义集合
,且存在常数k,使得任取x∈(0,+
),
<k},请问:是否存在常数M,使得任意的
∈
,任意的x∈(0,+
),有
<M成立?若存在,求出M的最小值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a27e72b96bc7af66c7472a9d7370e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e82cc461b9607e08a8b31597f6d26df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a27e72b96bc7af66c7472a9d7370e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b581dba9cddfa758eb3a030fcc9de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a27e72b96bc7af66c7472a9d7370e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
(1)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/843a1dd73fb90053eeb8f5d014f9c0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)已知0<a<b<c,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | t | 4 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0804b72b083963cfb022c1d3d45e758.png)
(3)定义集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/951068950ea1e02576e11df1d43de9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a27e72b96bc7af66c7472a9d7370e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f5817ab7b88e9d8a83dd086ffdb3c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a27e72b96bc7af66c7472a9d7370e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
更新时间:2019-03-05 14:39:27
|
相似题推荐
解答题-证明题
|
较难
(0.4)
解题方法
【推荐1】已知函数
.
(1)若函数
在R上是增函数,求a的取值范围;
(2)设
,若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a463ac0c7b7a38ba325ad39a5767f7a.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/916ee67551c5b0b50d6230135d03af41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0db032844af4b5bdf879cd3fd0e599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7c709bd13fc1031868c1f8039728207.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】已知函数
(
).
(1)若
在
上单调递增,求实数
的取值范围;
(2)当
时,若实数
,
(
),满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b48da2db7da7a05a3ce7562cacdc072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f80045c953d00cd5f0af06fb3752279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a415767156945ea8ada9ed3756019fc.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】已知函数
.
(1)当
时,求曲线
在点
处的切线方程;
(2)讨论
的单调性;
(3)若
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/664650a6b24edba52bea3b514f22019b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96d99a8d49d2194044fcabeb0c8f9f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667988f732a9c9ef60af0855e2a35fdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题
|
较难
(0.4)
【推荐2】已知函数
,其中
为自然对数的底数,若当
时,
的最大值为
.
(1)求函数
的解析式;
(2)若对任意的
,
,不等式
恒成立,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a49bb65ea2228ee194ebfe21dc5959b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1591d4244dcf5539a4ae98f554e91e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b3ae7e5228fd1acb0d46f6941143a7.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b3ae7e5228fd1acb0d46f6941143a7.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da347f7723b0694b2c70294bb354b0d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf329be298e20cac7b25225102d48217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2c42b7e18163df2808941d4bfad74ae.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】数列
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5268d2329aa52d65c603e3050d5ef857.png)
(1)求
的值;
(2)是否存在常数
,使得数列
是等比数列,若存在,求出
的值;若不存在,说明理由;
(3)设
,
,证明当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5268d2329aa52d65c603e3050d5ef857.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe61d313eeca8ba47478a9de40540db8.png)
(2)是否存在常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec6fb9e0625b85be3103d317fbb0cca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1761de3795504d0ec416973430e3458d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec6fb9e0625b85be3103d317fbb0cca.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672516b4ca5b692fecc28b136ed6485d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d74ef921f3c41aaaed40eaade5cc9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55562cb3c5c9078f375bbd9feaefcb3d.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知集合
,其中
且
,
,若对任意的
,都有
,则称集合A具有性质
.
(1)集合
具有性质
,求m的最小值;
(2)已知A具有性质
,求证:
;
(3)已知A具有性质
,求集合
中元素个数的最大值,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f12d3cd8f71a493b992647877b7da96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a80c5e31db0cd36e415229685de33e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8ecc8eb8eb4e2509897fcbff92db49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a578e8271c92160a8914460b09bfd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd24a572b923f59906ebc90d3aa311cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e86a882ef57f44f0ad22836079afe1.png)
(1)集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5892d36ab3e0df852a14b28a36296d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700537ac93b9dddbeb05d74067a03666.png)
(2)已知A具有性质
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aa9b9ef8fafe39ef9982a63a82590d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e68dc3bd653ea503d500677612629ac8.png)
(3)已知A具有性质
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aa9b9ef8fafe39ef9982a63a82590d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次