化简求值【x(x^2y^2-xy)-y(x^2-x^3y]/3x^2y,其中x=3y=1/2
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化简求值【x(x^2y^2-xy)-y(x^2-x^3y]/3x^2y,其中x=3y=1/2
化简求值【x(x^2y^2-xy)-y(x^2-x^3y]/3x^2y,其中x=3y=1/2
化简求值【x(x^2y^2-xy)-y(x^2-x^3y]/3x^2y,其中x=3y=1/2
[x(x^2y^2-xy)-y(x^2+x^3y)]/3x=[x^3y^2-x^2y-x^2y-x^3y^2]/3x=-2x^2y/3x =(-2/3)xy=(-2/3)*1*(-1/2)=1/3
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