若x^m=6,x^n=9,则(2x^3m*x^2n) / (x^m*x^n)^2*x^n
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若x^m=6,x^n=9,则(2x^3m*x^2n) / (x^m*x^n)^2*x^n
若x^m=6,x^n=9,则(2x^3m*x^2n) / (x^m*x^n)^2*x^n
若x^m=6,x^n=9,则(2x^3m*x^2n) / (x^m*x^n)^2*x^n
(2x^3m*x^2n) / (x^m*x^n)^2*x^n
=(2*6^3*9^2)/(6*9)^2*9
=4/3
若x^m=6,x^n=9,则(2x^3m*x^2n) / (x^m*x^n)^2*x^n
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