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[" The equation "2^(2x)+(a-1)2^(x+1)+a=0...

[" The equation "2^(2x)+(a-1)2^(x+1)+a=0" has roots of opposite signs,then the set of values of a is "],[[" (A) "a in(0,oo)," (B) "a in(-1,0)],[" (C) "a in(-oo,(1)/(3))," (D) "a in(0,(1)/(3))]]

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