执行如图所示的程序框图,若输入x=2,则输出y的值为
.
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若偶函数y=f(x)(x∈R)满足f(1+x)=f(1-x),且当x∈[-1,0]时,f(x)=x
2,则函数g(x)=f(x)-|1gx|的零点个数为( )
A.7
B.8
C.9
D.10
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函数y=x+sin|x|,x∈[-π,π]的大致图象是( )
A.
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B.
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C.
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D.
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已知F
1,F
2是椭圆
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的左、右焦点,点P在椭圆上,且
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,记线段PF
1与Y轴的交点为Q,O为坐标原点,若△F
1OQ与四边形OF
2PQ的面积之比为1:2,则该椭圆的离心率等于( )
A.
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B.
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C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123743429519324/SYS201310251237434295193009_ST/4.png)
D.
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某几何体的三视图如图所示,已知其正视图的周长为6,则该 几何体体积的最大值为( )
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A.
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B.π
C.
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D.2π
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设随机变量ξ服从正态分布N(2,9),若P(ξ>c+1)=P(ξ<c-1),则c=( )
A.1
B.2
C.3
D.4
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