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[" 5.If "2^(x)=3^(y)=12^(z)" ,show that ...

[" 5.If "2^(x)=3^(y)=12^(z)" ,show that "(1)/(z)=(1)/(y)+(2)/(x)],[" 6.If "2^(x)=3^(y)=6^(-z)," show that "(1)/(x)+(1)/(y)+(1)/(z)=0]

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