在平面直角坐标系中,A(1,4),点P在坐标轴上,S△PAO=4,求P点坐标.

问题描述:

在平面直角坐标系中,A(1,4),点P在坐标轴上,S△PAO=4,求P点坐标.

当点P在x轴上时,设P(x,0),
∵S△PAO=4,A(1,4)

1
2
|x|×4=4,解得x=±2,
∴P(-2,0)或(2,0);
当点P在y轴上时,设P(0,y),
∵S△PAO=4,A(1,4)
1
2
|y|×1=4,解得x=±8,
∴P(-8,0)或(8,0).
综上所述,P点坐标为(-2,0)或(2,0)或(-8,0)或(8,0).