在直角坐标平面XOY上的一列点A
1(1,a
1),A
2(2,a
2),A
3(3,a
3),…A
n(n,a
n),…简记为{A
n},若由
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225323511049309/SYS201311012253235110493020_ST/0.png)
构成的数列{b
n}满足b
n+1>b
n,(n=1,2,…,n∈N) (其中
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225323511049309/SYS201311012253235110493020_ST/1.png)
是与y轴正方向相同的单位向量),则称{A
n}为“和谐点列”.
(1)试判断:A
1(1,1),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225323511049309/SYS201311012253235110493020_ST/2.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225323511049309/SYS201311012253235110493020_ST/3.png)
…
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225323511049309/SYS201311012253235110493020_ST/4.png)
…是否为“和谐点列”?并说明理由.
(2)若{A
n}为“和谐点列”,正整数m,n,p,q满足:≤m<n<p<q1,且m+q=n+p.求证:a
q+a
m>a
n+a
p.
考点分析:
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