4x^5y^3/{x^4y^3[x^3y^2/2xy^2]} 其中x=-2,y=3
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4x^5y^3/{x^4y^3[x^3y^2/2xy^2]}其中x=-2,y=34x^5y^3/{x^4y^3[x^3y^2/2xy^2]}其中x=-2,y=34x^5y^3/{x^4y^3[x^3y
4x^5y^3/{x^4y^3[x^3y^2/2xy^2]} 其中x=-2,y=3
4x^5y^3/{x^4y^3[x^3y^2/2xy^2]} 其中x=-2,y=3
4x^5y^3/{x^4y^3[x^3y^2/2xy^2]} 其中x=-2,y=3
4x^5y^3/{x^4y^3[x^3y^2/2xy^2]} 其中x=-2,y=3
=4x^5y^3/{x^4y^3*1/2x}
=4x^5y^3/{1/2x^5y^3}
=8
化简后得(8/x),代入得(-4)
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