Question

平面直角坐标系中,O为原点,已知两定点A(1,0),B(0,-1),动点P(x,y)满足:OP=mOA+(m-1）OB,

Answer 1

OA=1,OB=-1

则OP=1

P点轨迹是圆,圆心(0,0)半径为1

方程为x^2+y^2=1