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已知函数f(x)=x2-ax+2在(-∞,1)上单调递减,那么a的范围是( ) ...
已知函数f(x)=x2-ax+2在(-∞,1)上单调递减,那么a的范围是( )
A.[2,+∞)
B.(2,+∞)
C.(-∞,2)
D.(-∞,2]
考点分析:
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