题目

It was reported that one of theprisoners attempted to e from the prison this morning. 答案：【1】escape已知曲线C：x24+y2=1，直线lx=ty=2-3t（t为参数）（1）以坐标原点为极点，x轴的正半轴为极轴建立直角坐标系，写出直线l的极坐标方程和曲线C的参数方程；（2）过曲线C上任意一点P作与l夹角为30°的直线，交l于点A，求|PA|的最大值与最小值．