4√9/8 * 1/2√49/50 -√5/28 / √1又1/35

问题描述:

4√9/8 * 1/2√49/50 -√5/28 / √1又1/35

4√9/8 * 1/2√49/50 -√5/28 / √1又1/35
= 3√2 * 7/20√2 -1/14√35 / (6/35√35 )
=21/10-5/12
=101/60