已知函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101329392215770/SYS201311031013293922157021_ST/0.png)
(其中常数a,b∈R),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101329392215770/SYS201311031013293922157021_ST/1.png)
.
(Ⅰ)当a=1时,若函数f(x)是奇函数,求f(x)的极值点;
(Ⅱ)若a≠0,求函数f(x)的单调递增区间;
(Ⅲ)当
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101329392215770/SYS201311031013293922157021_ST/2.png)
时,求函数g(x)在[0,a]上的最小值h(a),并探索:是否存在满足条件的实数a,使得对任意的x∈R,f(x)>h(a)恒成立.
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101329392215770/SYS201311031013293922157019_ST/0.png)
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,又函数f(x)的图象任意两相邻对称轴间距为
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