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若函数f(x)=sinωx+cosωx满足f(α)=-2,f(β)=0,且|α-β|的最小值为,则函数f(x)的单调增区间为_____________
函数(a>0,)在内恒有f(x)>0,则f(x)的单调增区间为____.
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A.(kπ,kπ+),k∈Z B.(kπ,(k+1)π),k∈Z
C.(kπ-,kπ+),k∈Z D.(kπ-,kπ+),k∈Z