It may be possible for large scale change to occur without leaders with magnetic personalities, but the pace of change would be slow, the vision uncertain, and the committee meetings endless.
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【简答题】已知函数 y= 2-x 2+x +lg(- x 2 +4x-3) 的定义域为M. (1)求M; (2)当x∈M时,求函数f(x)=a?2 x+2 +3?4 x (a<-3)的最小值.