1 . 已知函数
.
(Ⅰ)求函数
的最大值,并写出
取最大值时
的取值集合;
(Ⅱ)已知
中,角A,B,C的对边分别为a,b,c若
b+c=2.求实数a的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/10/19/1573080263262208/1573080269570048/STEM/966d94f1c236455f975d69dc60d0aecd.png)
(Ⅰ)求函数
![](https://img.xkw.com/dksih/QBM/2016/10/19/1573080263262208/1573080269570048/STEM/ab3f560761ff4994b9604400f253cb81.png)
![](https://img.xkw.com/dksih/QBM/2016/10/19/1573080263262208/1573080269570048/STEM/ab3f560761ff4994b9604400f253cb81.png)
![](https://img.xkw.com/dksih/QBM/2016/10/19/1573080263262208/1573080269570048/STEM/f1036959bff04293896e0fe33a6868ee.png)
(Ⅱ)已知
![](https://img.xkw.com/dksih/QBM/2016/10/19/1573080263262208/1573080269570048/STEM/46a0bb6ed61e42acba7a6caa67133588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7776bd62456b78c33d097c572dbae23.png)
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2 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b890bf69b845b4c1cb66aad52f1536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
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3 .
的值为
![](https://img.xkw.com/dksih/QBM/2016/10/19/1573080263262208/1573080269242368/STEM/3d481a4a679f4a1bb0c7535afc49346e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2014高三·全国·专题练习
解题方法
4 . 函数
在R上的部分图像如图所示,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f06aef3197f50d50505ab596dc31620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/918aaa14f1f5b67c82c8793bfe72fe28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f06aef3197f50d50505ab596dc31620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://img.xkw.com/dksih/QBM/2014/6/13/1571775209611264/1571775215206400/STEM/d5d79ee1-d59d-49ff-b6c1-8243a1a21170.png)
您最近一年使用:0次
2016-12-03更新
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