请写清楚一些
12^(3x-y)=(3x2^2)^(3x-y)=3^(3x-y)X2^2(3x-y)=(3^x)^3/3^yX(2^x)^6/(2^y)^2=8/4X1/25=2/25...
12^(3x-y)
=(3x2^2)^(3x-y)
=3^(3x-y)X2^2(3x-y)
=(3^x)^3/3^y X (2^x)^6/(2^y)^2
=8/4X1/25
=2/25 展开
=(3x2^2)^(3x-y)
=3^(3x-y)X2^2(3x-y)
=(3^x)^3/3^y X (2^x)^6/(2^y)^2
=8/4X1/25
=2/25 展开
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