由曲线x=-1,x=0,y=ex以及x轴所围成的面积为 .
考点分析:
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向量
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=(2,0),
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=(x,y),若
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与
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-
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的夹角等于
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,则|
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|的最大值为( )
A.4
B.2
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C.2
D.
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函数f(x)=Asin(ωx+φ)(A>0,ω>0)在x=1和x=-1处分别取得最大值和最小值,且对于任意
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,则( )
A.函数y=f(x+1)一定是周期为4的偶函数
B.函数y=f(x+1)一定是周期为2的奇函数
C.函数y=f(x+1)一定是周期为4的奇函数
D.函数y=f(x+1)一定是周期为2的偶函数
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已知函数f(x)=sinx+cosx,g(x)=2sinx,动直线x=t与f(x)、g(x)的图象分别交于点P、Q,|PQ|的取值范围是( )
A.[0,1]
B.[0,2]
C.[0,
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]
D.[1,
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]
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已知对数函数f(x)=log
ax是增函数,则函数f(|x|+1)的图象大致是( )
A.
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B.
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C.
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D.
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如图,为了测量某湖泊的两侧A,B的距离,给出下列数据,其中不能唯一确定A,B两点间的距离是( )
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A.角A、B和边b
B.角A、B和边a
C.边a、b和角C
D.边a、b和角A
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