
如图,△ABC的三个顶点坐标分别为A(﹣2,4)、B(﹣3,1)、C(﹣1,1),以坐标原点O为位似中心,相似比为2,在第二象限内将△ABC放大,放大后得到△A′B′C′.
(1)画出放大后的△A′B′C′,并写出点A′、B′、C′的坐标.(点A、B、C的对应点为A′、B′、C′)
(2)求△A′B′C′的面积.



如图,直线
与
轴,
轴分别交于
,
两点,抛物线
经过
,
两点,与
轴的另一个交点为
(点
在点
的左侧),抛物线的顶点为点
. 抛物线的对称轴与
轴交于点
.

的坐标;
上一动点,连接
并延长交
轴交于点
, 当
时,求点
的坐标;
是该抛物线上的一动点,设点
的横坐标为
, 试判断是否存在这样的点
, 使
, 若存在,请直接写出
的值;若不存在,请说明理由.
元素代号 | L | M | Q | R | T |
原子半径/nm | 0.160 | 0.143 | 0.089 | 0.102 | 0.074 |
主要化合价 | +2 | +3 | +2 | +6、﹣2 | ﹣2 |
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变形为
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