设函数
,
.
(1)若
在
上有两个不同的实数根,求实数
的取值范围;
(2)若
,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad50df92e1c682b2db0b59792b12bfb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502c4ff1cd420b9da4de849e63c307e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1fce155963060b2e5b9147a185897cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18265cee35aff00721ec2854046dfd3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ed85b04c66ec33f21d1e0ebdcaca8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66dc0efa65c73dc66242f14ee0ee17e7.png)
2021·全国·模拟预测 查看更多[1]
(已下线)普通高等学校招生全国统一考试 数学押题卷(三)
更新时间:2021-05-23 14:53:55
|
相似题推荐
解答题-问答题
|
困难
(0.15)
解题方法
【推荐1】已知函数
.
(1)若
是函数
的极值点,证明:
;
(2)证明:对于
,存在
的极值点
,
满足
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1947fd8b1e5fa9096c13256fdb3a23ed.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6133358b60e493e01a4c1c0a48d7b89e.png)
(2)证明:对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d12d0bd9afdd4e53ff37f5bfcaa1106c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.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/1974c74aa530c586016005f0b11c82dd.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】设函数
,
,
.
(1)求
在
上的单调区间;
(2)若在y轴右侧,函数
图象恒不在函数
的图象下方,求实数a的取值范围;
(3)证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd61fe22aee4614fca8fa62941ba95be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a17af60d751eeb32312caca30aed317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4cbc7b067862a3d9c6789b392fc068.png)
(2)若在y轴右侧,函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(3)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f3a3fe446ace5cd48ed93a51cb0b65.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
解题方法
【推荐1】已知函数
.
(1)讨论函数
零点个数;
(2)若
恒成立,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7a13e40c631a24b3040401ec4e3dbe.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c122b27a48a306b81db5bae9a50db767.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0437d7f883ee4ae9f42ac3103940086.png)
(1)求函数
的单调区间;
(2)若方程
的两个实数根互为相反数,求实数
的值;
(3)在条件(2)下,若函数
有两个不同的零点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0437d7f883ee4ae9f42ac3103940086.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8d15bcdb0c20c9abee93881d68eb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8260d7692bc7723a03f8e2e90d5aa91a.png)
(3)在条件(2)下,若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a37144fe84d91cdde66f37a4d5bbdf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564b94fb68ac9f108c3407f9b09556ab.png)
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