已知a²+ b²=6ab,则(a+b)/(a-b)=
问题描述:
已知a²+ b²=6ab,则(a+b)/(a-b)=
答
a²+ b²=6ab
(a+b)^2=6ab+2ab=8ab
(a-b)^2=6ab-2ab=4ab
(a+b)/(a-b)=√2