已知函数f(x)=ln(2ax+1)+
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-x
2-2ax(a∈R).
(1)若x=2为f(x)的极值点,求实数a的值;
(2)若y=f(x)在[3,+∞)上为增函数,求实数a的取值范围;
(3)当a=-
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时,方程f(1-x)=
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有实根,求实数b的最大值.
考点分析:
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(理科)设椭圆
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的右焦点为F
1,直线
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与x轴交于点A,若
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(其中O为坐标原点)
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2+(y-2)
2=1的任意一条直径(E、F为直径的两个端点),求
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已知点(1,
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)是函数f(x)=a
x(a>0,且a≠1)的图象上一点,等比数列{a
n}的前n项和为f(n)-c,数列{b
n}(b
n>0)的首项为c,且前n项和S
n满足:S
n-S
n-1=
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+
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(n≥2).
(1)求数列{a
n}和{b
n}的通项公式;
(2)若数列{c
n}的通项c
n=b
n![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123713132697912/SYS201310251237131326979018_ST/3.png)
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n;
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n,问T
n>
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的最小正整数n是多少?
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1B
1C
1D
1中,AD=AA
1=1,AB=2,点E在棱AB上移动.
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1E⊥A
1D;
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已知函数f(x)=sinxcosφ+cosxsinφ(其中x∈R,0<φ<π),且函数y=f(2x+
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