Question

已知a+b=-8,ab=6,b倍根号a分之b+a倍根号b分之a的指

Answer 1

b倍根号a分之b+a倍根号b分之a
=b√b/√a+a√b/√b
=(b²+a²)/√(ab)
=[(a+b)²-2ab]/√(ab)
=(64-12)/√6
=26√6/3

追问

看不懂啊 b√b/√a+a√b/√b
什么意思

追答

=b√b/√a+a√a/√b 后面一个应该是a √(b/a)=√b/√a √(a/b)=√a/√b
=(b²+a²)/√(ab)
=[(a+b)²-2ab]/√(ab)
=(64-12)/√6
=26√6/3