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下面是方程的有（ ）
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教案备课库《2016年山东省临沂市小升初数学模拟试卷》真题及答案
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下面各式是方程的有
仔细阅读下面解方程组得方法然后解决有关问题解方程组时如果直接消元那将时很繁琐的若采用下面的解法则会简
下面的式子中不是方程的有
X=0
3m=n
X+1.9＞2.5
根据下面表格中的取值方程x2+x﹣3=0有一个根的近似值精确到0.1是
1.5
1.2
1.3
1.4
已知a是任意有理数在下面各题中结论正确的个数是①方程②方程③方程④方程
0
1
2
3
根据下面的反应路线及所给信息填空.1A的结构简式为.2在①～⑥的各步反应中属于取代反应的有属于加成反
阅读下面的解题过程解方程|x+3|=2.解当x+3≥0时原方程可化成为x+3=2解得x=-1经检验x
下面的说法是正确的．
方程的解就是解方程
3
+
5=8是方程
方程也是等式
等式就是方程．
关于方程3x＋x2＋2x－1＝0下列说法正确的是
方程有两不相等的负实根
方程有两个不相等的正实根
方程有一正实根，一零根
方程有一负实根，一零根
下列四个图形中图形下面的方程是图形中曲线的方程的是
@B.
@D.
对于方程x2＋bx－2＝0下面观点正确的是
方程有无实数根，要根据b的取值而定
无论b取何值，方程必有一正根、一负根
当b>0时，方程两根为正；b<0时.方程两根为负
∵－2<0，∴方程两根肯定为负
关于方程 下面说法正确的是
上述方程是帕斯卡定律的表达式
上述方程适用可压缩流体
这是实际流体的伯努利方程
上述方程适用非稳定流体
下面方程中有两个不等实数根的方程是
x
2
+x﹣1=0
x
2
﹣x+1=0
x
2
﹣x+
=0
x
2
+1=0
记方程①x2+a1x+1=0②x2+a2x+1=0③x2+a3x+1=0其中a1a2a3是正实数当a
若方程②③都有实根则方程①无实根 ;
若方程②③都有实根则方程①有实根;
若方程②无实根但方程③有实根时,则方程①无实根;
若方程②无实根但方程③有实根时,则方程①有实根;
用方程表示下面的数量关系．超市有西瓜x吨售出21吨还剩下35吨．方程．
下面一段话有不简洁的地方在不影响原意的情况下必须删除的有三处把要删除部分的序号填在下面的横线上门捷列
下面的式子中不是方程的有
15×6=2M
2x+8=16
9.5=5×1.9
8x＞7
下面四个方程中与方程x－1＝2的解相同的一个是.
2x＝6
x＋2＝－1
2x＋1＝3
－3x＝9
小明用下面的方法求出方程2－3＝0的解请你仿照他韵方法求出下面另外两个方程的解并把你的解答过程填写在
下面的式子中不是方程的有
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两个合数不可能成为互质数．．
用递等式计算能简便计算的要写出简算过程．①[3.2×1﹣+3]×2②1+2+4+3③×99④3.75×4+1.6×3⑤1÷2.5+2.5×0.4⑥3﹣1﹣．
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下列分解质因数哪个是正确的
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=0 x2+1=0
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