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分式的通分与约分
①:x/a(x-y),y/b(y-x);
②:1/x^2-1,2x/x^2-3x+2;
人气:184 ℃ 时间:2020-01-25 11:13:21
解答
①:
x/a(x-y)=xb/ab(x-y),

y/b(y-x)=-y/b(-y)=-ay/ab(x-y);
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