点P轨迹为两直线的角平分线,因为直线交点为(-11/14,-5/7)设角平分线斜率为k,则有(k-4/3)/(1+4k/3)=(-12/5-k)/(1-12k/5)整理得8k^2-63k-8=0解得k=-1/8或8所以P点轨迹方程为y+5/7=-1/8(x+11/14)或y+5/7=8(x+11/14)即2x...