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在等差数列{an}中,若a2003+a2005+a2007+a2009+a201...
在等差数列{an}中,若a2003+a2005+a2007+a2009+a2011+a2013=120,则2a2018-a2028的值为 .
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2是双曲线
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已知函数f(x)=Acos(ωx+φ)(A>0,ω>0,0<φ<π)为奇函数,该函数的部分图象如图所示,△EFG是边长为2的等边三角形,则f(1)的值为( )
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D.
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