我来问一些初中的数学题 1.若а是无理数,ь也是无理数且а+ь-3=0,则а,ь的值是2.因式分解:а(ь-с)+2ь(с-а)+с(с-ь)3.已知х,у满足等式х=(у-1)÷(у+1)则用х的代数式表示у得4.若1∕х+1/у=
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![我来问一些初中的数学题 1.若а是无理数,ь也是无理数且а+ь-3=0,则а,ь的值是2.因式分解:а(ь-с)+2ь(с-а)+с(с-ь)3.已知х,у满足等式х=(у-1)÷(у+1)则用х的代数式表示у得4.若1∕х+1/у=](/uploads/image/z/8894777-41-7.jpg?t=%E6%88%91%E6%9D%A5%E9%97%AE%E4%B8%80%E4%BA%9B%E5%88%9D%E4%B8%AD%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98+1.%E8%8B%A5%D0%B0%E6%98%AF%E6%97%A0%E7%90%86%E6%95%B0%2C%D1%8C%E4%B9%9F%E6%98%AF%E6%97%A0%E7%90%86%E6%95%B0%E4%B8%94%D0%B0%2B%D1%8C-3%3D0%2C%E5%88%99%D0%B0%2C%D1%8C%E7%9A%84%E5%80%BC%E6%98%AF2.%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9A%D0%B0%EF%BC%88%D1%8C-%D1%81%29%2B2%D1%8C%28%D1%81-%D0%B0%29%2B%D1%81%28%D1%81-%D1%8C%293.%E5%B7%B2%E7%9F%A5%D1%85%2C%D1%83%E6%BB%A1%E8%B6%B3%E7%AD%89%E5%BC%8F%D1%85%3D%EF%BC%88%D1%83-1%EF%BC%89%C3%B7%EF%BC%88%D1%83%2B1%EF%BC%89%E5%88%99%E7%94%A8%D1%85%E7%9A%84%E4%BB%A3%E6%95%B0%E5%BC%8F%E8%A1%A8%E7%A4%BA%D1%83%E5%BE%974.%E8%8B%A51%E2%88%95%D1%85%2B1%EF%BC%8F%D1%83%3D)
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