已知函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354188246271/SYS201311031023541882462014_ST/0.png)
.
(1)求函数f(x)的单调增区间;
(2)已知f(α)=3,且α∈(0,π),求α的值.
考点分析:
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我们把形如
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354188246271/SYS201311031023541882462013_ST/0.png)
的函数因其图象类似于汉字“囧”字,故生动地称为“囧函数”,并把其与y轴的交点关于原点的对称点称为“囧点”,以“囧点”为圆心凡是与“囧函数”有公共点的圆,皆称之为“囧圆”,则当a=1,b=1时,所有的“囧圆”中,面积的最小值为
.
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已知数列{a
n},{b
n}满足a
1=1,a
2=2,b
1=2,且对任意的正整数i,j,k,l,当i+j=k+l时,都有a
i+b
j=a
k+b
l,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354188246271/SYS201311031023541882462012_ST/0.png)
的值是
.
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设
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354188246271/SYS201311031023541882462011_ST/0.png)
,a>0,函数f(θ)=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354188246271/SYS201311031023541882462011_ST/1.png)
的最小值为25,则实数a=
.
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已知
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354188246271/SYS201311031023541882462010_ST/0.png)
,若对任意两个不等的正实数m,n都有
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354188246271/SYS201311031023541882462010_ST/1.png)
>3恒成立,则实数a的取值范围是
.
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如图,在△ABC中,∠BAC=120°,AB=AC=2,D为BC边上的点,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354188246271/SYS201311031023541882462009_ST/0.png)
•
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354188246271/SYS201311031023541882462009_ST/1.png)
=0,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354188246271/SYS201311031023541882462009_ST/2.png)
=2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354188246271/SYS201311031023541882462009_ST/3.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354188246271/SYS201311031023541882462009_ST/4.png)
=
.
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