若α,β是实系数方程x
2+x+p=0 的二根,|α-β|=3,则求实数p的值及方程的根.
考点分析:
相关试题推荐
已知二次函数y=a(a+1)x
2-(2a+1)x+1,当a=1,2,…,n,…时,其抛物线在x轴上截得的线段长依次为d
1,d
2,…,d
n,…,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183410532554813/SYS201310241834105325548015_ST/0.png)
(d
1+d
2+…+d
n)的值是( )
A.1
B.2
C.3
D.4
查看答案
函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183410532554813/SYS201310241834105325548014_ST/0.png)
(0<a<1)的图象的大致形状是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183410532554813/SYS201310241834105325548014_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183410532554813/SYS201310241834105325548014_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183410532554813/SYS201310241834105325548014_ST/images3.png)
D.
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183410532554813/SYS201310241834105325548013_ST/0.png)
展开式中的常数项是( )
A.5
B.-5
C.-20
D.20
查看答案
函数y=log
ax当x>2 时恒有|y|>1,则a的取值范围是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183410532554813/SYS201310241834105325548012_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183410532554813/SYS201310241834105325548012_ST/1.png)
C.1<a≤2
D.
查看答案
设直线l过点P(0,3),和椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183410532554813/SYS201310241834105325548011_ST/0.png)
交于A、B两点(A在B上方),试求
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183410532554813/SYS201310241834105325548011_ST/1.png)
的取值范围
.
查看答案