1 . 已知函数
.
(1)当
时,证明:
;
(2)若函数
在
上只有一个零点,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360cf074f25741cf9f57428d79b1b98c.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3641891c2d679702c89f19e00b31ca4c.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71163f419555f2ed76075c8ff659fbfc.png)
您最近一年使用:0次
解题方法
2 . 已知函数
,若
,且
,
,则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5310729a64523e8c56f6eda43e432b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef91ce9a7d9a5d24572467045f26c85c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2210f152080d9a68a97c805f5c1cde96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd7919ee1616b47b5a57338b866f9f5d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
3 . 记等差数列
的n和为
,数列
的前k 项和为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a996c4e29bcc381353e072eb04c11b0.png)
A.若![]() ![]() ![]() |
B.若当且仅当![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
解题方法
4 . 已知
中,
,
,
,O为
的外心,若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1ec9c5eaed4c211a040a2a33fb7c91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f6aebbd26b65f4f1395a8f31129a6b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
5 . 已知
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4305eaf66047b9173e15e63c08207df.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-07-07更新
|
595次组卷
|
4卷引用:广东省清远市2022-2023学年高二下学期期末数学试题
广东省清远市2022-2023学年高二下学期期末数学试题辽宁省辽阳市2022-2023学年高二下学期期末考试数学试题云南省曲靖市富源县2022-2023学年高二下学期期末检测数学试题(已下线)第三章 利用导数比较大小 专题三 利用帕德逼近、泰勒展开式比大小 微点3 利用帕德逼近、泰勒展开式比大小综合训练
6 . 已知函数
.
(1)若
,求
的图象在
处的切线方程;
(2)若
有两个极值点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb41724d9a030cc2694a58dee5387494.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b725fdc8de9800f2692f6fea8585b1e9.png)
您最近一年使用:0次
2023-07-07更新
|
461次组卷
|
5卷引用:广东省清远市2022-2023学年高二下学期期末数学试题
解题方法
7 . 已知椭圆
的离心率为
,且与双曲线
有相同的焦距.
(1)求椭圆
的方程;
(2)设椭圆
的左、右顶点分别为
,过左焦点
的直线
交椭圆
于
两点(其中点
在
轴上方),求
与
的面积之比的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b1488a0b3ddebccf2fc8e7a67a42e2.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e64c953aaf341e772a5fe776fbc78a.png)
您最近一年使用:0次
解题方法
8 . 已知正四面体
的棱长为a,,N为
的重心,P为线段CN上一点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
A.正四面体的体积为![]() |
B.正四面体的外接球的体积为![]() |
C.若![]() |
D.P点到各个面的距离之和为定值,且定值为![]() |
您最近一年使用:0次
2023-07-07更新
|
385次组卷
|
3卷引用:广东省江门市2022-2023学年高一下学期期末数学试题
9 . 已知实数x,y满足
(
为自然对数的底数,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b27c4b121d2526e80e69f7d19172072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797bbd18359c9a29842b39109b3a0aac.png)
A.当![]() ![]() | B.当![]() ![]() |
C.当![]() ![]() | D.当![]() ![]() |
您最近一年使用:0次
2023-07-06更新
|
684次组卷
|
6卷引用:广东省阳江市2022-2023学年高二下学期期末数学试题
广东省阳江市2022-2023学年高二下学期期末数学试题浙江省台州市2022-2023学年高二下学期期末数学试题(已下线)第六章 导数与不等式恒成立问题 专题十二 恒成立问题综合训练(已下线)压轴小题8 导数研究双变量取值范围问题(已下线)高二下学期期末复习选择题压轴题十九大题型专练(1)(已下线)第7题 切线相关的双变量问题(压轴小题一题多解)
解题方法
10 . 若
时,不等式
恒成立,则整数
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0166fb5da3081cc64a628ca0c31770f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2023-07-06更新
|
334次组卷
|
2卷引用:广东省阳江市2022-2023学年高二下学期期末数学试题