=1--八年级数学

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• 解方程：2x+1-xx2-1=0．-数学
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• 解方程：2x-1=4x2-1-数学
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• 解方程：1-x2-x-3=1x-2-数学
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• —Will you give me some suggestions on my job interview?—Smiling is a great way to make yourself ____
• 在正数范围内定义一种运算☆，其规则为a☆b=1a+1b，根据这个规则x☆(x+1)=32的解为______．-数学
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• 若分式方程xx-1=mx-1无解，则m的值为______．-数学
• 已知关于x的方程2axa-x=23的解为x=1，则a等于（）A．0.5B．2C．-2D．-0.5-数学
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• 已知关于x的分式方程a+2x+1=1的解是非正数，则a的取值范围是______．-数学
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• 若关于x的方程2kx-1-xx2-x=kx+1x只有一个解（相等的解也算作一个），试求k的值与方程的解．-数学
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