已知a、b互为相反数,c、d互为倒数,m的绝对值是2,求
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的值.
考点分析:
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(2009•黄石)求值:|
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225759362185730/SYS201310212257593621857018_ST/0.png)
-2|+2009
-(-
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)
-1+3tan30°.
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计算:
(1)2008
+|-1|-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225759362185730/SYS201310212257593621857017_ST/0.png)
cos30°+(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225759362185730/SYS201310212257593621857017_ST/1.png)
)
3;
(2)计算:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225759362185730/SYS201310212257593621857017_ST/2.png)
.
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计算:
(1)
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225759362185730/SYS201310212257593621857016_ST/0.png)
;
(2)计算
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+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225759362185730/SYS201310212257593621857016_ST/2.png)
-sin30°+(π+3)
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(2009•吉林)若|a|=5,b=-2,且ab>0,则a+b=
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(2009•孝感)若|m-n|=n-m,且|m|=4,|n|=3,则(m+n)
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