几道数学题,求解 各位亲帮帮忙啊!急~~~1.已知(y+x)分之(y-x)等于七分之一,求y分之x2.若方程(x-1)分之(3x+a)等于2的解为整数,求a的取值范围
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![几道数学题,求解 各位亲帮帮忙啊!急~~~1.已知(y+x)分之(y-x)等于七分之一,求y分之x2.若方程(x-1)分之(3x+a)等于2的解为整数,求a的取值范围](/uploads/image/z/3886812-36-2.jpg?t=%E5%87%A0%E9%81%93%E6%95%B0%E5%AD%A6%E9%A2%98%2C%E6%B1%82%E8%A7%A3+%E5%90%84%E4%BD%8D%E4%BA%B2%E5%B8%AE%E5%B8%AE%E5%BF%99%E5%95%8A%21%E6%80%A5%7E%7E%7E1.%E5%B7%B2%E7%9F%A5%EF%BC%88y%2Bx%EF%BC%89%E5%88%86%E4%B9%8B%EF%BC%88y-x%EF%BC%89%E7%AD%89%E4%BA%8E%E4%B8%83%E5%88%86%E4%B9%8B%E4%B8%80%2C%E6%B1%82y%E5%88%86%E4%B9%8Bx2.%E8%8B%A5%E6%96%B9%E7%A8%8B%EF%BC%88x-1%29%E5%88%86%E4%B9%8B%EF%BC%883x%2Ba%29%E7%AD%89%E4%BA%8E2%E7%9A%84%E8%A7%A3%E4%B8%BA%E6%95%B4%E6%95%B0%2C%E6%B1%82a%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4)
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