化简(x一y分之1)除以(y一x分之1)的结果是,

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化简(x一y分之1)除以(y一x分之1)的结果是,
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化简(x一y分之1)除以(y一x分之1)的结果是,
化简(x一y分之1)除以(y一x分之1)的结果是,

化简(x一y分之1)除以(y一x分之1)的结果是,
分子,分母,同时乘以xy,明白不?以后这样子的都这样化简,
=xy(x一y分之1)除以xy(y一x分之1)
=(x平方y-x)/(xyy-y)=x(xy-1)/y(xy-1)=x/y

(x一y分之1)除以(y一x分之1)
=(xy-1)/y÷(xy-1)/x=x/y

(x一y分之1)除以(y一x分之1)

=y分子(xy-1)除以x分之(xy-1)

=1/y除以1/x

=x/y

(x-1/y)÷(y-1/x)
=(xy/y-1/y)÷(xy/x-1/x)
=(xy-1)/y÷(xy-1)/x
=(xy-1)/y×x/(xy-1)
=x/y