(1)根号6a的三次方÷根号2a,
=a√6a÷√2a
=a√3
(2)-根号2（1/5）÷根号4（1/11）
=-2√2(11/5)
=-22/5√2
(3)2根号a²b/3根号ab
=2√a/3
=2/3√a