已知函数
,若存在
,
,使得
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59cc9387455d03ef28189ff3906c38e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1f6c694dd3b97bdec9af80dda163a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/847fea233b65a834f7a827bf1fa85fa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.1 | B.2 | C.![]() | D.![]() |
更新时间:2024-05-12 23:03:18
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【推荐1】阻尼器是一种以提供运动的阻力,耗减运动能量,从而达到减振效果的专业工程装置.如图,是被称为“镇楼神器”的我国第一高楼上海中心大厦的阻尼器.由物理学知识可知,某阻尼器模型的运动过程可近似为单摆运动,其离开平衡位置的位移S(cm)与时间t(s)的函数关系式为
,若该阻尼器模型在摆动过程中连续三次位移为
的时间分别为
,
,
,且
,
,则下列为
的单调区间的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6349f0b1b0f9ee6c59ccf7791de3eb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3313ceb96689abc7d94e649c59063aac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c7eb49a823f757461cd5260757b088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db31d2bbc9b044646fd026f239e7b62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cdde426db07cad502e0524338a2a433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddf84799c5f76cb2afa081ceb925c089.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b096e36a68bb4f953f4f2d507af022.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】已知函数
(![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c16cc7ecce3766b1de269db898c26d.png)
)在
上至少存在两个不同的
,
满足
,且
在
上具有单调性,点
和直线
分别为
图像的一个对称中心和一条对称轴,则下列命题中正确的是( )
①
的最小正周期为
;
②
;
③
在
上是减函数
④将
图像上每一点的横坐标伸长为原来的2倍(纵坐标不变),得到
的图像,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9300f015e88886fde0d6a987eaabce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a067e86ae162185a04bdf862b40cd255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c16cc7ecce3766b1de269db898c26d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89040554aa79926881b74fe954e4d08a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4324210735686fb21351566abe8c77ab.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/c13ca0f27aa97d8d1bec1f6879f460d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56555a70dc8f94606fb216fcd5c46b47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/393b3bacc16708ca73eff1451cb429d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b283eb08db6f602ede1ae542c5e3662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5ecf482b7feba701178518a4c295e79.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4155d08635fab2cff2c14b91e4b3f3f4.png)
④将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9300f015e88886fde0d6a987eaabce4.png)
A.④ | B.①④ | C.② | D.②③ |
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【推荐1】已知函数
在
内恰有
个最值点和
个零点,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeba0ae206de65a1e996fed6aaea5a24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e11f4ca0e7ace69f92130d0525bcdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
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解题方法
【推荐2】在
中,内角
的对边分别为
,且
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
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