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若=a,=b,则的值用a、b可以表示为( ) A. B. C. D.
若
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717008_ST/0.png)
=a,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717008_ST/1.png)
=b,则
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717008_ST/2.png)
的值用a、b可以表示为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717008_ST/3.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717008_ST/4.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717008_ST/5.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717008_ST/6.png)
考点分析:
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下列计算,正确的是( )
A.(2a
2b
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2=2a
4b
5B.(a-b)
2=a
2-b
2C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717007_ST/0.png)
=x+y
D.(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717007_ST/1.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717007_ST/2.png)
)(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717007_ST/3.png)
))=x-y
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把(a-1)
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717006_ST/0.png)
中的(a-1)因子移入根号内得( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717006_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717006_ST/2.png)
C.-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717006_ST/3.png)
D.-
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若
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717005_ST/0.png)
成立,则x的取值范围是( )
A.x≥2
B.x≤3
C.2≤x≤3
D.2<x<3
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计算(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717004_ST/0.png)
-1)(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717004_ST/1.png)
+1)
2的结果是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717004_ST/2.png)
+1
B.3(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717004_ST/3.png)
-1)
C.1
D.-1
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计算
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717003_ST/0.png)
的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102242822571706/SYS201311031022428225717003_ST/1.png)
B.0
C.6
D.-6
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