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已知函数F(x)=x2%2(A+1)x+2Alnx(A>0).(Ⅰ...

设A=1+0.2%+2%+20% B=0.2%+2%+20% 原式=A×(B+2)-(A+2)×B =A×B+2×A-(A×B+2×B) =2×A-2×B =2×(A-B) =2×1 =2

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