已知函数
.
(1)解不等式
;
(2)记函数
的最小值为m,正实数a,b满足
,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e32fe6eea89758fe843a869976d08fd.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4509817be39bef4bcde115996ee39e8.png)
(2)记函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857ce2790f14cac8a0cfecc154015237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9048a4655708ea1ff6702b4b5061975a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb8d3035de644271d9c753e95fc9781.png)
更新时间:2020-03-06 17:04:28
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解答题-证明题
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适中
(0.65)
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【推荐1】选修4-5:不等式选讲
已知函数
的最大值为3,其中
.
(1)求
的值;
(2)若
,
,
,求证:
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36697da820b838ab8cb1588e68126276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8aa5c24766744e194574d31ca534c18.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd42f780c2a802ec023ca445d193a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf25975de678e7aeeac24d76fd5402a.png)
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解答题-问答题
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(0.65)
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【推荐2】已知实数
满足
.
(1)若
,求实数
的取值范围;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bc03651f597b676bc0094448454ad8.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418eefc93ee299e5f9d168bb6f6a955a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c752ca84c64623d95d1c1270f85a341.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】已知函数
.
(1)当
时,求不等式
的解集;
(2)若关于
的不等式
对任意
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e90c1d630bf0d8f08a825de82c562c.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5300590ff3ed47179909171816b56fc6.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94cc25a7cf28ed096549fbae97fce40a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-问答题
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解题方法
【推荐2】已知函数
.
(1)求不等式
的解集;
(2)记
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,且正实数
、
满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e0d00fa527bf2aa4b294769f96af0.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/256f3981024e53f373a80aad40e994ae.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](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/6964f26e70afe3d425ea971d3212bb9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7266b2ef457b8ddeee3fa2cc24022e.png)
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