已知函数
.
(1)当
时,讨论
的单调性;
(2)当
时,若方程
有三个不相等的实数根
,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1955f850a56fbd729e8ef999209f098.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5809a06357f94fc7a2156c7e7af1ed2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1310a7a80d1f8751a3f8cafe7f8c8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9e12d9f9b1dbd7a1ad8fffe752f5e7.png)
23-24高二下·云南·期中 查看更多[3]
更新时间:2024-06-14 19:51:52
|
相似题推荐
解答题-证明题
|
困难
(0.15)
【推荐1】函数
,
.
(1)求证:当
时,
存在唯一极小值点
,且
;
(2)当
时,设
,求
在
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19a4764c1b085797d61209b672288e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd3fa2944f27c306708100b69fcbe79.png)
(1)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/313660c7376dbff3e1a5e1757ff29ae0.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8be08249329249ba63c89c82ab76f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f6052dc5bf7b01084f144e813835afd.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐2】设
,
为函数
(
)的两个零点.
(1)求实数
的取值范围;
(2)证明:
.
![](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/5e7b8620f702c6ac06fc961a53e11d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4c78214e43a8b93f2a57072033cbcf.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c628208aa46181ef044ab7e38adc8254.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐3】已知函数
.
(1)当
时,判断
的单调性;
(2)若
在
上为单调增函数,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/889bc668d3fdfd9d8aa39a0072fb9666.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f6f7ea32b59cd8beeb2d6bb74632bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】已知函数
.
(1)若不等式
有解,求实数
的取值范围;
(2)若
有两个不同的零点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef889b4685f91ee649e927747c91862.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4091973f9ac170d4289b830d5db23825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.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/36a6ddb8ec5abc0a8ee18ba4f5cbf717.png)
您最近一年使用:0次
【推荐2】已知
,
.
(1)记
,讨论
的单调区间;
(2)记
,若
有两个零点a,b,且
.
请在①②中选择一个完成.
①求证:
;
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd58e16598e6bdb3c35194af69951a2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b613d0bfe3fc354b79e35bd80e7392f8.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71607511fdd4faa9e832345ceb2a817d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25dda3572b334c96eb51be1cf438f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92860378096f519a8fb276d07dbfabce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
请在①②中选择一个完成.
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc69ff68c1dd962c9a3bd835490339c4.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7006713e07f57f8caa25e6796a32a3.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
解题方法
【推荐1】已知函数
,
(e为自然对数的底数)
(1)当
时,恰好存在一条过原点的直线与
,
都相切,求b的值;
(2)若
,方程
有两个根
,(
),求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8ca8ea93e01e9e0f0c3e4aa5425448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f6ad09c04177babb84ec1f65da48ca.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ffecb03c47be920254c4ccffa5b222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3d1f05bfe75dbdff9a94b4d9c893a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8ca3aa2d1ba52e82613d0d65d800e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6184e9328528fb411c93fd0cd0c1f16e.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐2】已知函数
,
.
(1)记
,当
时,求
的单调区间.
(2)若关于x的方程
有两个不相等的实数根
,
.
①求实数a的取值范围;
②证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78b72e777c37963f7c48aa27a21ccdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2294bf0b10d85236ca70aa7f6e52103.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d22b4beb798f9b1b12b9036e725f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a4a0dd7307a1323d25331e60782d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
(2)若关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9587df831df1af5e7dd6be5fdc7bd8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
①求实数a的取值范围;
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475c9073257b3d0760e2c6051a82d592.png)
您最近一年使用:0次