解不等式组
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022163850606518532/SYS201310221638506065185015_ST/0.png)
,并把解集在数轴上表示出来,并写出该不等式组的最大整数解.
考点分析:
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(1)计算:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022163850606518532/SYS201310221638506065185014_ST/0.png)
-
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+
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+6sin60°;
(2)先化简,再求值:(
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+1)÷
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022163850606518532/SYS201310221638506065185014_ST/4.png)
,其中a=2+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022163850606518532/SYS201310221638506065185014_ST/5.png)
.
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如图,△ABC与△A′B′C′是位似图形,且顶点都在格点上,则位似中心的坐标是
.
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如图,在△ABC中,AB=AC=5cm,cosB=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022163850606518532/SYS201310221638506065185012_ST/0.png)
.如果⊙O的半径为
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cm,且经过点B,C,那么线段AO=
cm.
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若x=1是一元二次方程x
2+x+c=0的一个解,则c
2=
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分解因式:ax
3y+axy
3-2ax
2y
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