已知一元二次方程(x+2)2=1,则它的解是 .
考点分析:
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如图,在直角坐标系中O为原点,矩形OABC的边OC=7,OA=4,一动点P从A点出发沿AB、BC方向以每秒1个单位长度的速度运动,设经过x秒后,以点A、O、P为顶点的三角形面积为y,则y与x的函数关系大致图象是( )
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B.
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C.
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D.
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如图,已知梯形ABCD,AD∥BC,AD=DC=4,BC=8,点N在BC上,CN=2,E是AB中点,在AC上找一点M使EM+MN的值最小,此时其最小值一定等于( )
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A.4
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在平面直角坐标系中有两点A(6,2)、B(6,0),以原点为位似中心,相似比为1:3,把线段AB缩小,则过A点对应点的反比例函数的解析式为( )
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D.
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