一.(1)3√1/2-√1/8+√9/8(2)15√0.2+4√125+3√1/27-√75(3)(√12-√1/2-2√1/3)-2(√1/8-√18)(4)(6√1/6-1/2√24)+(3/2√2/3-√54)(5)(1/6√24-√0.5+2√2/3)-1/4(√1/8-√3/2) 二.先化简,再求值:(6x√y/x+3/y√xy^3)-(4x√x/y+√36xy),其中x=3/2,y=27

问题描述:

一.(1)3√1/2-√1/8+√9/8(2)15√0.2+4√125+3√1/27-√75
(3)(√12-√1/2-2√1/3)-2(√1/8-√18)(4)(6√1/6-1/2√24)+(3/2√2/3-√54)(5)(1/6√24-√0.5+2√2/3)-1/4(√1/8-√3/2) 二.先化简,再求值:(6x√y/x+3/y√xy^3)-(4x√x/y+√36xy),其中x=3/2,y=27