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[" 22.If "log(y)x+log(x)y=2,x^(2)+y=12" ...

[" 22.If "log_(y)x+log_(x)y=2,x^(2)+y=12" ,then the value of "xy" is "],[[" (1) "9," (2) "12," (3) "15," (4) "21]]

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