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解方程(2x+1)2=3(2x+1)
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教案备课库《一元二次方程单元测试题2》真题及答案
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解方程xx﹣2=2x+1.
阅读下面的例题解方程x2-∣x∣-2=0解当x≥0王时原方程化为x2-x-2=0解得x1=2x2=-
解方程x+1x﹣2=2xx﹣2
阅读下列例题解方程x2﹣|x|﹣2=0解1当x≥0时原方程化为x2﹣x﹣2=0解得x1=2x2=﹣1
解方程x+1x+2=xx-1
在Photoshop中文件最小可设定到个像素
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解方程22x-2+1=2x-x-3
阅读例题请参照例题的方法解方程x2﹣|x﹣1|﹣1=0解方程x2﹣|x|﹣2=0解1当x≥0时得x2
阅读下面的例题解方程x﹣12﹣5|x﹣1|﹣6=0例解方程x2﹣|x|﹣2=0解令y=|x|原方程化
解方程xx+12-xx2-3-2x+1x-1=20.
解方程22x+12-8x+1x-1=34
如图所示物体
在斜面上由静止匀加速滑下x1后,又匀减速地在平面上滑过x2后停下,测得x2=2x1,则物体在斜面上的加速度a1与在平面上的加速度a2的大小关系为( )
A.a1=a2
a1=2a2
a1=
a2
a1=4a2
解方程x-12+2xx-1=0
解方程2x-2+x2=x+1x-1+x.
下列解方程的过程中正确的是
x
2
=-2,解方程,得x=±
(x-2)
2
=4,解方程,得x-2=2,x=4
4(x-1)
2
=9,解方程,得4(x-1)=±3,x
1
=
,x
2
=
(2x+3)
2
=25,解方程,得2x+3=±5,x
1
=1,x
2
=-4
阅读下面的例题范例解方程x2﹣|x|﹣2=0解1当x≥0时原方程化为x2﹣x﹣2=0解得x1=2x2
.阅读下面的例题解方程x﹣12﹣5|x﹣1|﹣6=0解方程x2﹣|x|﹣2=0解原方程化为|x|2﹣
下列四个函数中y随x增大而减小的是
y=2x
y=-2x+5
y=x
2
+2x1
.阅读下面的例题解方程x2﹣|x|﹣2=0解1当x≥0原方程化为x2﹣x﹣2=0解得x1=2x2=﹣
某公司对20名六西格玛绿带奖励了2万元奖金按每个绿带的表现进行了二次分配有人计算出奖金额的方差为81
8198s=(x-u)2x1=x+100,u1=u+100x1-u1=x-u,s1=s
8189x2=(1+0.1)x,u2=(1+0.1)u,x2-u2=1.1x-1.1u=1.1(x-u),s2=1.12s
9198
以上都不对
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sin245°+cos260°.
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