连接PG,取PG中点A,则A(1,-0.5)
过A做AB垂直PG,交x轴于B,则B为所求,此时BG=BP,差为0最小.
PG:y=5/6*x-4/3
设AB:y=-1.2*x+b
将(1,-0.5)代入有b=0.7
则AB:y=-1.2x+0.7
令y=0,解得x=7/12,所以B(7/12,0)
连接PG,取PG中点A,则A(1,-0.5)
过A做AB垂直PG,交x轴于B,则B为所求,此时BG=BP,差为0最小.
PG:y=5/6*x-4/3
设AB:y=-1.2*x+b
将(1,-0.5)代入有b=0.7
则AB:y=-1.2x+0.7
令y=0,解得x=7/12,所以B(7/12,0)