名校
1 . 已知实数
满足
;
(1)求证:
;
(2)将上述不等式加以推广,把
的分子
改为另一个大于
的自然数
,使得
对任意的
恒成立,请加以证明;
(3)从另一角度推广,自然数
满足什么条件时,不等式
对任意
恒成立,请加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce613eaa5df46a50174085ef5d1087fb.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3aec1994a01be9e9335a62177131ee4.png)
(2)将上述不等式加以推广,把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32df45c5ee591bb2b763deacb26110c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942932aac23ed64c833aacaae02e66bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
(3)从另一角度推广,自然数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b511bcbe94aa484c0a067891fbf7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3823cef58d924746e16b32155e3bc16d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
您最近一年使用:0次
2020-11-12更新
|
249次组卷
|
2卷引用:上海市金山中学2020-2021学年高一上学期期中数学试题
解题方法
2 . 若一个定义域为区间D的函数
满足:对于D内任意的
、
(
),自变量
、
、
对应的函数值分别为
、
、
,都有
成立,则称该函数是区间D上的“
函数”.
(1)判断函数
(
)是否是“
函数”?并说明理由;
(2)已知
,求证:对数函数
是“
函数”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.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/33bd24e647a626899a243a3f3984f90a.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/f890c615c5af6329afbcbcb0c70b7592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9314bd1d7a6e070f4f2428f9a321804e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4591bf56cd97e02cefde40c40154ab82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82869dad28f771d088772a2c2b08b187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
您最近一年使用:0次
名校
解题方法
3 . (1)已知
,
,
均为正数,求证:
.
(2)已知正数
,
满足
,若
恒成立,求
的取值范围.
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93efa3e1b9b9ece092b3e13e6e571724.png)
(2)已知正数
![](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/a170f00dce976bcdcacd4d284e8c03de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d2c041ef33d79930983323bad00af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
解题方法
4 . (1)若
是正常数,
,求证:
(当且仅当
时等号成立).
(2)求函数
的最小值,并求此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edae93ec9de65d7e8afd2a53063c8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29574517e0bd98aa055ee15120f8fff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/406627fe3a42a76fa1b6559193d0136e.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86dd35a3b3185cf1dc4cf59262cb2546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
解题方法
5 . 已知
,
,
都是正实数.
(1)若
,求
的最小值;
(2)求证:
.
![](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/071a7e733d466949ac935b4b8ee8d183.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42d412d5a5c13e17ebc05ad19c098b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7afa8efbab4dcf2f56b68c14369a2a.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dbc0be0392978bab08034733948e9d5.png)
您最近一年使用:0次
解题方法
6 . 已知实数
满足
,
;
(1)求证:
;
(2)当(1)中不等式取等号时,且关于
的不等式
的解集非空,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ace74bfb716753490ebe0e740ff5baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751e274e9107d780c39ba9c49d6daefb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd9f31428a1fef11a765dab4b2faa360.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7683ddf8383976ccbdd3003bd69e30.png)
(2)当(1)中不等式取等号时,且关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/906f0e8f1b1f1552f37aa6403d0d2168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解题方法
7 . 已知函数
.
(Ⅰ)解不等式
;
(Ⅱ)若正实数a,b满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54a0c07847bb5a711881d4ac2bac957.png)
(Ⅰ)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94cc25a7cf28ed096549fbae97fce40a.png)
(Ⅱ)若正实数a,b满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9870bcb2f4f3490969dab18466523fed.png)
您最近一年使用:0次
2020-04-16更新
|
221次组卷
|
2卷引用:河南省名校天一大联考2018-2019学年高二阶段性测试(四)数学理科试题
名校
8 . 设函数
(
,实数
).
(1)若
,求实数
的取值范围;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9285171a223cd4147a9196cc8135a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7713241a6c10d6329346db44740cae74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727b7b960bea80caea68404a1f942c53.png)
您最近一年使用:0次
2020-01-12更新
|
303次组卷
|
4卷引用:内蒙古乌兰察布市等五市2019-2020学年高三1月调研考试(期末)数学(理)试题
9 . 已知定义在R上的偶函数
和奇函数
满足
.
(1)证明:
;
(2)当
时,不等式
恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd6c5d5713df54f8c8955eb5ddaf2c3.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0225ec08a4dc3123b025c77250bb2d15.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53224898de85a85058ad336490bbbaa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a858314216eb404750efbd5dcc61bbe.png)
您最近一年使用:0次
名校
10 . 已知
,且
.
(1)求证:
;
(2)当
时,不等式
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcbca3478eae63853d2aab5332e2e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1482b02ae6adf69e711932be87acc291.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c328c9c4ec69c4275e27576fb61655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60fc24ad9d57da167ba7bfa95390ef4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2019-07-16更新
|
4050次组卷
|
17卷引用:陕西省榆林市第二中学2018-2019学年高二下学期期末考试数学(理)试题
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