已知函数
的最大值为M,若存在实数m,n,使得对任意实数x总有
成立,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/792df8028c72ca8003101a02f0ccfa5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4cf1dd74879e8d21ff91a3e12db903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445c5a3a2a688f838cbe774eb672fb61.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-11-04 19:21:06
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解题方法
【推荐1】将函数
先向右平移
个单位长度,再将图象上各点的横坐标变为原来的
倍(纵坐标不变),则所得函数
图象,若
在区间
上的最小值为
,则
的最小值等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a22b1803dff3a627afd26a5b56eb24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8a997ec86ca39fef94703375c4638d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db6bffa6210020700b116fd6f3b4257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba2fe9a077cdd128d3c8f538778f424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知函数
,
,
,且
在
上单调递增,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e153c6fc4337b9fad6da86d5743959e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfcf825204195d7e87c8e44c08eb6ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de694144e7993d8a34e6c5d98664d031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9448bf1d6136b3a108e7ea60506ad39.png)
A.![]() | B.![]() | C.2 | D.3 |
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【推荐1】设函数
与
有相同的对称轴,且
在
内恰有3个零点,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef8a75ab5e87bce6ca7732879333038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d412c8edf6894ca4c11708096bbfd16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998e2a7ca823add34905623dacefc039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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适中
(0.65)
名校
【推荐2】函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6edf75125de912213dfff91e09f7a3.png)
的部分图象如图所示,以下说法:
①
的单调递减区间是
,
;
②
的最小正周期是4;
③
的图象关于直线
对称;
④
的图象可由函数
的图象向左平移一个单位长度得到.
正确的个数为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/7d75d109-285d-4126-8ff0-72104a9aff90.png?resizew=184)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6edf75125de912213dfff91e09f7a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90298411c1d7e291b8633666cbdcfb0e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da57de7433257814a5bc7918115f93a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99074f989e74d5ff306b4b7b7a379c1f.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba53065eb180a682305fddb95d14b62f.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a01ee1ccf706df06bd020bee0ff8d83f.png)
正确的个数为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/7d75d109-285d-4126-8ff0-72104a9aff90.png?resizew=184)
A.1 | B.2 | C.3 | D.4 |
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