1.已知x-3y=0,且xy≠0,求x²-y²/x²-xy+y²的值.3.当x取何值时,分式(1+2x)(1/2-x)/(2x-1)²的值为零.2.已知a/b=2,求a²-4ab+3b²/a²-8ab+7b²的值.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/27 05:11:18
![1.已知x-3y=0,且xy≠0,求x²-y²/x²-xy+y²的值.3.当x取何值时,分式(1+2x)(1/2-x)/(2x-1)²的值为零.2.已知a/b=2,求a²-4ab+3b²/a²-8ab+7b²的值.](/uploads/image/z/1739603-11-3.jpg?t=1.%E5%B7%B2%E7%9F%A5x-3y%3D0%2C%E4%B8%94xy%E2%89%A00%2C%E6%B1%82x%26%23178%3B-y%26%23178%3B%2Fx%26%23178%3B-xy%2By%26%23178%3B%E7%9A%84%E5%80%BC.3.%E5%BD%93x%E5%8F%96%E4%BD%95%E5%80%BC%E6%97%B6%2C%E5%88%86%E5%BC%8F%281%2B2x%29%281%2F2-x%29%2F%282x-1%29%26%23178%3B%E7%9A%84%E5%80%BC%E4%B8%BA%E9%9B%B6.2.%E5%B7%B2%E7%9F%A5a%2Fb%3D2%2C%E6%B1%82a%26%23178%3B-4ab%2B3b%26%23178%3B%2Fa%26%23178%3B-8ab%2B7b%26%23178%3B%E7%9A%84%E5%80%BC.)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/27 05:11:18