考点分析:
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已知函数
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的图象上,以N(1,n)为切点的切线的倾斜角为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225233649608539/SYS201311012252336496085021_ST/1.png)
,
(1)求m,n的值;
(2)是否存在最小的正整数k,使得不等式f(x)≤k-1999对于x∈[-1,3]恒成立?如果存在,请求出最小的正整数k;如果不存在,请说明理由;
(3)求证:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225233649608539/SYS201311012252336496085021_ST/2.png)
.
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已知椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225233649608539/SYS201311012252336496085020_ST/0.png)
的一个顶点A与抛物线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225233649608539/SYS201311012252336496085020_ST/1.png)
的焦点重合,离心率
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225233649608539/SYS201311012252336496085020_ST/2.png)
(1)求椭圆的方程;
(2)直线l:y=kx-2(k≠0)与椭圆相交于不同的两点M,N满足
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225233649608539/SYS201311012252336496085020_ST/3.png)
,求k.
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正项等比数列{a
n}的前n项和记为S
n,a
1=1,S
3=13
(Ⅰ)求{a
n}的通项公式;
(Ⅱ)等差数列{b
n}的各项为正,且b
2=5,又a
1+b
1,a
2+b
2,a
3+b
3成等比数列,设A
n=a
nb
n,求{A
n}的前n项和T
n.
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如图,已知三棱锥A-BPC中,AP⊥PC,AC⊥BC,M为AB中点,D为PB中点,且△PMB为正三角形.
(1)求证:DM∥平面APC;
(2)求证:平面ABC⊥平面APC;
(3)若BC=4,AB=20,求三棱锥D-BCM的体积.
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设f(x)是定义在[2m,2-m]上的奇函数,且对任意a,b∈[2m,2-m],a-b≠0时,都有
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225233649608539/SYS201311012252336496085017_ST/0.png)
.
(Ⅰ)求实数m的值;
(Ⅱ)解不等式f(2x-3)>f(x+1).
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