若x,y为实数,且y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000314917585967/SYS201311030003149175859017_ST/0.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000314917585967/SYS201311030003149175859017_ST/1.png)
+1,求
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000314917585967/SYS201311030003149175859017_ST/2.png)
的值.
考点分析:
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已知x=1是一元二次方程(m+1)x
2-m
2x-2m-1=0的一个根.求m的值,并写出此时的一元二次方程的一般形式.
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解方程:
(1)5(y+2)=2y(y+2);
(2)2x
2-5x+1=0.
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计算:
(1)
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000314917585967/SYS201311030003149175859014_ST/0.png)
•2
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000314917585967/SYS201311030003149175859014_ST/1.png)
•(-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000314917585967/SYS201311030003149175859014_ST/2.png)
);
(2)(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000314917585967/SYS201311030003149175859014_ST/3.png)
a
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000314917585967/SYS201311030003149175859014_ST/4.png)
+6a
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000314917585967/SYS201311030003149175859014_ST/5.png)
)-(b
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000314917585967/SYS201311030003149175859014_ST/6.png)
-a
2![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000314917585967/SYS201311030003149175859014_ST/7.png)
).
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观察下列各式:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000314917585967/SYS201311030003149175859013_ST/0.png)
…请你将发现的规律用含自然数n(n≥1)的等式表示出来
.
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方程(3-2x)(x+5)=-6x+14化为一般形式是
.
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