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能使有意义的x的取值范围是(▲).A.x>-2B.x≥-2C.x>0D.x≥-2且x≠0-八年级数学
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若-八年级数学
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要使有意义,则字母x应满足的条件是().A.x=2B.x<2C.x≤2D.x≥2-九年级数学
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化简0.5+12-(13-412)-数学
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(6分)设的小数部分为a,的倒数为b,求的值。-九年级数学
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一艘轮船先向正东方向航行2小时,再向西北方向航行t小时。船的航速是每小时25千米。试用关于t的代数式表示船离出发地的距离;-八年级数学
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计算+的结果为。-八年级数学
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函数中自变量x的取值范围是()A.x≤0B.x≤-2C.x≤2D.x≥-2-九年级数学
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若二次根式在实数范围内有意义,则x的取值范围是.-九年级数学
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计算:=.-八年级数学
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计算:2327+634=______.-数学
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函数中,自变量的取值范围是-八年级数学
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若为非负实数,则关于的说法正确的是()A.表示数的平方根B.比小C.一定是无理数D.在数轴上一定能找到表示数的点-八年级数学
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下列命题中,错误的是()A.关于x的一元二次方程,必有两个互为相反数的实根;B.关于x的方程必有两实根;C.关于x的一元二次方程必有一根为零;D.关于x的方程可能没有实根.-九年级数学
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计算的值为A.B.C.D.-八年级数学
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(每小题4分,共8分)(1)计算:;(2)解方程:(3x+2)2-4=0-九年级数学
题目简介
化简的结果是▲。-八年级数学
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答案
答案 3