1
3。根据双曲线定义，AF2-AF1=6，BF2-BF1=6，两式相加，AF2+BF2=AF1+BF1+12=24周长=AF2+BF2+AB=24+12=36三1。p=6，y^2=12x2.x^2=2py,过点(6,3), x^2=12y
