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一个角的度数是405°,化为弧度数是( ) A. B. C. D.
一个角的度数是405°,化为弧度数是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123713132701290/SYS201310251237131327012002_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123713132701290/SYS201310251237131327012002_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123713132701290/SYS201310251237131327012002_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123713132701290/SYS201310251237131327012002_ST/3.png)
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A.a
B.
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C.2a
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计算1-2sin
222.5°的结果等于( )
A.
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B.
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C.
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(2)若y=f(x)在[3,+∞)上为增函数,求实数a的取值范围;
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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.
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(理科)设椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123713132697912/SYS201310251237131326979019_ST/0.png)
的右焦点为F
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123713132697912/SYS201310251237131326979019_ST/1.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123713132697912/SYS201310251237131326979019_ST/2.png)
(其中O为坐标原点)
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已知点(1,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123713132697912/SYS201310251237131326979018_ST/0.png)
)是函数f(x)=a
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n}的前n项和为f(n)-c,数列{b
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n-S
n-1=
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123713132697912/SYS201310251237131326979018_ST/2.png)
(n≥2).
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n}和{b
n}的通项公式;
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n}的通项c
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n![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123713132697912/SYS201310251237131326979018_ST/3.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123713132697912/SYS201310251237131326979018_ST/4.png)
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的最小正整数n是多少?
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