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[" If "log(x+y)=log2+(1)/(2)log x+(1)/(2...

[" If "log(x+y)=log2+(1)/(2)log x+(1)/(2)log y," then "],[[" (A) "x+y=0," (B) "xy=1," (C) "x^(2)+xy+y^(2)=0," (D) "x-y=0]]

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