计算;⑴3√2/√27; ⑵√8/√2A; ⑶(√b/5)/(√b/20a^2)(a>0)写一下过程!
问题描述：
计算;⑴3√2/√27; ⑵√8/√2A; ⑶(√b/5)/(√b/20a^2)(a>0)写一下过程!
答
⑴3√2/√27
=3√2/3√3
=√2/√3
=√6/3
⑵√8/√(2A)
=√(8/2A)
=√(4/A)
=2√A/A
⑶(√b/5)/(√b/20a^2)
=√[(b/5)/(b/20a²)]
=√(4a²)
=|2a|
=2a