-八年级数学

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• 当X时，-九年级数学
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• 在函数中，自变量的取值范围是（）A．且B．且C．D．-九年级数学
• 化简的结果是（）A．B．C．D．-九年级数学
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• 友情提示：请同学们做完上面考题后，再认真检查一遍，估计一下你的得分情况，如果你全卷得分低于60分（及格线），则本题的得分将计入全卷得分，但计入后全卷总分最多不超过60分-八年级数学
• 小题1:2＋－4小题2:．-九年级数学
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• 如果把棱长分别为3.51cm,2.26cm的两个正方体铁块熔化，制成一个大的正方体铁块，那么这个大正方体铁块的棱长是多少？（用一个式子表示，并用计算器进行计算，最后结果保留2个-八年级数学
• -八年级数学
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• 化简的结果是（）A.一2BC.2D.4-九年级数学
• 计算：-九年级数学
• （本题6分）观察下列各式及其验证过程：验证：小题1:(1)按照上面结论猜想的结果，并写出验证过程；小题2:(2)根据对上述各式规律，写出用n(n为正整数，且n≥2)表示的等式并给出证明-九年级数学
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• ①；-九年级数学