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已知实系数方程x2+ax+2b=0的一个根大于0且小于1,另一根大于1且小于2,...
已知实系数方程x
2+ax+2b=0的一个根大于0且小于1,另一根大于1且小于2,则
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的取值范围是( )
A.(
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,1)
B.(
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,1)
C.(-
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,
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)
D.(0,
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)
考点分析:
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,a
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将函数f(x)=x
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平移后得到函数g(x)的图象,若函数g(x)满足g(2+x)+g(2-x)=2,则向量
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B.(-2,-1)
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若x,y满足x
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称
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间的“距离”.若向量
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满足:①
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;②
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B.
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C.
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D.
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