1 . 已知函数
.
(1)设
的反函数为
,求
的最值.
(2)函数
满足
,求证:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edb40aa0c70fcef722fdb19ff134b48.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90459228092aec6d324784babcbb2cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92860378096f519a8fb276d07dbfabce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e7d4a1283e55b1dc8d63fa012c53af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b7511e6ce72a5232820b7007f976be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee284116732bcc5309e44ca41abdcfa.png)
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2 . 已知
,
,对任意的实数
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c624ba61a6885c1b81ec8d6c9307ecfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad481cbfb67ac9cdbc0537f3de23b022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846ab1c77d4cd15dda12ed65a910ad40.png)
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3 . 证明不等式:
(1)若
,
且
,则
;
(2)若
,
是实数且
,则
;
(3)把(1)和(2)中的不等式推广到一般情形,并证明你的结论.
(1)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/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb82da7d6889d032ece3f1b1dc10d571.png)
(2)若
![](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/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4937e38b3dee8128e5b9914e0a055b.png)
(3)把(1)和(2)中的不等式推广到一般情形,并证明你的结论.
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4 . 证明下列不等式:
(1)若
,则
;
(2)对任意
,有
;
(3)对任意
,有
;
(4)若
,则
.
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c74bc05ba2e70080935ad46836f134de.png)
(2)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40865b13c775d3f26490aba72d5deb5d.png)
(3)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c197486dfb1671a5f3b33ac8d4c6dbdf.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31be670d32e753012125c503f2f3be56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d8eb08f685cda451c7ceaa42008931.png)
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5 . 设a、b为不相等的实数,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877c0be40ec541ed3b403a5917f615cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19000de5a7a0437c5fe7aae9cf713787.png)
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