函数y＝中，自变量x的取值范围是____-八年级数学

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• 计算：-八年级数学
• 若有意义，则的取值范围是（）A．B．C．D．一切实数-九年级数学
• 若，则=.-八年级数学
• 无理数是()A．无限循环小数B．带根号的数C．除有限小数以外的所有实数D．除有理数以外的所有实数。-八年级数学
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• 当时，化简的结果是．-九年级数学
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• (8分）)先化简、再求值：，其中a＝－3．-八年级数学
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• 化简：_______________。-八年级数学
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• （本小题满分10分）计算或化简：（1）—+-九年级数学
• 函数中，自变量的取值范围是()．A．B．≥C．≤D．-九年级数学
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• 计算：①②-八年级数学
• 计算：-八年级数学
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• 计算：.(本小题6分）-九年级数学
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• 比较大小：（填“＜”、“＞”、“=”）-八年级数学
• .当x满足时，式子有意义-八年级数学
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• 如果是二次根式，那么应满足的条件是（）A．B．C．≥D．≤-九年级数学
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• 若是实数，，则-八年级数学
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