设函数
.
(1)证明:
;
(2)计算:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ac2eed962bdd61146b57e411344946.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc077e342f34420a09f987456258241.png)
(2)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f5d9f64ce433e6e88dcfe66e004099a.png)
更新时间:2016-12-05 01:17:20
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相似题推荐
解答题-证明题
|
较易
(0.85)
名校
解题方法
【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648ad0df1bf28053141d8ef414885b0f.png)
(1)求
,
的值;
(2)判断函数
在区间
的单调性并证明;
(3)若不等式
对一切
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648ad0df1bf28053141d8ef414885b0f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce6155e181e21ce56ea658b70f8af17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d55ef0d1b7ea88d92fd6e1ecebb5f5.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d67bbceac9c742eef1c7e79a681e570b.png)
(3)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e69cdd6c2f610f3a6d6873819e5a3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a193df7aad0d32e5f5afe7b1c6b3aef.png)
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解答题-问答题
|
较易
(0.85)
名校
【推荐2】如图,在直角三角形
中,
,动点P从点A出发,以
的速度沿
向B点移动,动点Q从点C出发,以
的速度沿
向A点移动.若
同时出发,设运动时间为
(
),
的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/e12ca49a-cd20-45f5-a13b-641a0d53a99a.png?resizew=112)
(1)求S与
之间的函数关系式;
(2)求S的最大值;
(3)当
为多少时,
为等腰直角三角形,并求出此时S的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f598eeefdea3350f6ef2d4aa69b2a8f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1a48b92c61d209d0556e4cd8fdb70b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0fed6f944ef4b07f7e33ca893581fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ecfda698212594a342565257dc5508.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/e12ca49a-cd20-45f5-a13b-641a0d53a99a.png?resizew=112)
(1)求S与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)求S的最大值;
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
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