【简答题】已知直角坐标系中有一点A(-4,3),点B在x轴上,△AOB是等腰三角形。 (1)求满足条件的所有点B的坐标; (2)求过O,A,B三点且开口向下的抛物线的函数表达式(只需求出满足条件的一条即可); (3)在(2)中求出的抛物线上存在点P,使得以O,A,B,P四点为顶点的四边形是梯形,求满足条件的所有点P的坐标及相应梯形的面积。
【简答题】John was a very strong man. Once he got a job of cutting wood in a forest. His boss gave him an axe and showed him the area where he should work. The first day, John cut down 18 trees. 'Good,' the bos...
【单选题】The young man helped the company recover, so his boss gave him an apartment _________.
【简答题】已知直角坐标系中有一点A(-4,3),点B在x轴上,△AOB是等腰三角形。 (1)求满足条件的所有点B的坐标。(直接写出答案) (2)求过O、A、B三点且开口向下的抛物线的函数解析式。(只需求出满足条件的即可)。 (3)在(2)中求出的抛物线上存在点p,使得以O、A、B、P四点为顶点的四边形是梯形,求满足条件的所有点P的坐标及相应梯形的面积。
【判断题】一级市场的组织形态有交易所和场外市场两种。