a3+a5=6,a4=2√2,可知a3,a5为正数,等比数列an中,a3*a5=a4^2=8,所以a3=8/a5,所以8/a5+a5=6,a5^2-6a5+8=0,可得a5=4,a4=2√2,公比为√2,a2+a6=5√2.谢谢啦O(∩_∩)O哈不用谢