名校
1 . 已知函数
的最小值为
.
(1)求
的值;
(2)若
为正实数,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fe135393da98073a1384631a2c79427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86be2de99fbf7f99cd54ab399146b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6667d0e519e8eed7491b7361e98cb369.png)
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2020-01-17更新
|
625次组卷
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6卷引用:福建省福州市2019-2020学年高三上学期期末质量检测数学(文)试题
2 . 已知函数
.
(1)证明:
;
(2)当
时,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9268a13a72eacb0d59358249667be1cc.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2608a57caffde627dbf140ca22a2ff8a.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e96cc112a53421f3e85f4b59f29d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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2020-01-13更新
|
358次组卷
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8卷引用:福建省泉州市2019-2020学年高三上学期期末质检文数学试题
3 . [选修4-5:不等式选讲]
已知函数
.
(Ⅰ)求不等式
的解集;
(Ⅱ)若
,
且
,求证:
.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd65345dec765bd06d1d9e7e8900a67e.png)
(Ⅰ)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983f16806f222ec07f78f9c11eaa9521.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf4174ebc717ef312e25125eba0eb27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/054d00a127a585f7401a05d5351c6e37.png)
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2019-05-07更新
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682次组卷
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5卷引用:【市级联考】福建省宁德市2019届高三毕业班第二次(5月)质量检查考试数学理试题
名校
4 . 函数
,其中
,若
的解集为
.
(1)求
的值;
(2)求证:对任意
,存在
,使得不等式
成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a59f54e4518299549902121aeacd76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561480e3d3809613c33ce1f9c8890510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a1c92c42188e3b2cb800d1186eab12.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求证:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79f4a8d6663130ea66dc2e23e99ba7f2.png)
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2019-01-20更新
|
453次组卷
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5卷引用:【市级联考】福建省厦门市2019届高三第一学期期末质检理科数学试题
名校
5 . 已知函数
的最小值为
.
(1)求
;
(2)若正实数
,
,
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fc69c21ff43797710c4dc1776f48df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若正实数
![](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/989680e6b74504b71f5ece8771c5301d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604cbb530836d2a4d554d02f3004e350.png)
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2019-04-23更新
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1460次组卷
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7卷引用:福建省莆田市仙游县2019-2020学年高三上学期期中数学(文)试题
6 . (1)已知
为实数,用分析法证明
;
(2)用数学归纳法证明
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82aeb47db5ad291f237b5e3ac5b259a.png)
(2)用数学归纳法证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/314ff1b297c2bb46771d8284f7343cbb.png)
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7 . 已知函数f(x)=|ax﹣1|﹣|2x+a|的图象如图所示.
(1)求a的值;
(2)设g(x)=f(x
)+f(x﹣1),g(x)的最大值为t,若正数m,n满足m+n=t,证明:
.
(1)求a的值;
(2)设g(x)=f(x
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04e25b790205d5bbff8f68f85ed3e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e71683443426a02a40c3e5407fe939.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/517bbed5-6c0e-40ae-8d2b-bb292f7097a7.png?resizew=133)
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2019-04-01更新
|
1105次组卷
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10卷引用:【省级联考】福建省2019届高三模拟考试数学(文)试题
【省级联考】福建省2019届高三模拟考试数学(文)试题【省级联考】福建省2019届高三模拟考试理科数学试题【市级联考】广西南宁市2019届高三毕业班第一次适应性测试数学(理科)试题【市级联考】广西南宁市2019届高三毕业班第一次适应性测试数学(文)试题江西省临川一中,师大附中,南昌二中,临川二中等九校重点中学2019届高三第三次联考数学理科试卷江西省临川一中,师大附中,南昌二中,临川二中等九校重点中学2019届高三第三次联考数学文科试卷【市级联考】辽宁省辽阳市2019届高三下学期一模数学(理科)试题河南省许平汝联盟2021-2022学年高三下学期4月模拟考试文科数学试题河南省许平汝联盟2021-2022学年高三下学期4月模拟考试理科数学试题河南省鹤壁市浚县第一中学2021-2022学年高三下学期4月考试文科数学试题
名校
8 . 已知不等式
的解集为
.
(Ⅰ)求
的值;
(Ⅱ)若
,
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547f7886ace9be17204403d2503efd3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a319964d72109fc2c5773cf21803c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb040e4be56b314424d05cd22e437b14.png)
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2018-12-27更新
|
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4卷引用:【校级联考】福建省“永安一中、德化一中、漳平一中”2019届高三上学期12月三校联考数学(理)试题
2014·福建·一模
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解题方法
9 . 已知
,且
.
(1)试利用基本不等式求
的最小值
;
(2)若实数
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7584692aef43723de60b4dc419a86c88.png)
(1)试利用基本不等式求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a14c388e1e2e5a2ff1ccf6caffbee0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eff82688620fc769f4d82a2d298329b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b9f823826a14bd7ea5de862ba7faec.png)
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2018-06-14更新
|
874次组卷
|
3卷引用:2014届福建省高三高考压轴理科数学试卷
名校
10 . 已知函数
.
(1)当
时,解不等式
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f1bcf7ac45a798633b84ab5be4c9ed0.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3061bb4c726f3a1734a0d1d084b58f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8e96a8c86d287ffa839c51a450d48a.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e0d8bdabeb382b2d9d522dfb80423d.png)
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