直线L与直线2强调指出——是什么意思?!x=-1+3ty=2-4t则， 4x+3y-2=0联立它与曲线(y-2)^2-x^2=1就有：[(2-4x)/3-2]^2-x^2=1===> 7x^2+32x+7=0所以，x1+x2=-32/7，x1x2=1所以，(x1-x2)^2=(x1+x2)^2-4x1x2=(-32/7)^2-4=828/49(y1-y2)^2=(16/9)*(x1-x2)^2=1472/49所以，AB=√[(x1-x2)^2+(y1-y2)^2]=√(2300/49)=(10/7)√23AB中点为：x=(x1+x2)/2=-16/7，y=(y1+y2)/2=26/7所以，CP=√[(-16/7+1)^2+(26/7-2)^2]=15/7