先化简,再求值:
(1)
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225403915746833/SYS201311012254039157468015_ST/0.png)
,其中a=256,b=2011;
(2)化简:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225403915746833/SYS201311012254039157468015_ST/1.png)
.
考点分析:
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