√1/2xy÷2√x×√2/xy

问题描述:

√1/2xy÷2√x×√2/xy

√(1/2 xy)÷2√x×√[2/(xy)]
=1/2 √{1/2 * xy * 1/x * *2/(xy)}
=1/2 √{1/x}
=(√x) / (2x)