11-6√2=9+2-6√2=9-6√2+2=(3-√2)^2
则有：√11-6√2=√=(3-√2)^2=3-√2
则有：a+b=3-√2
则a=1,b=2-√2
则有：a+b+2／b=(3-√2)+2/(2-√2)=3-√2+2+√2=5
所以有：a+b+2／b=5