X÷√X=X*(√X)÷√X=X√X或者√X=X的1/2次方X÷√X=X的(3-1/2)次方=X的5/2次方

换成X的平方

两次根式乘法法则: 根号x*根号y=根号(xy) 这道题最后是=xy

根号有意义则x-3>=0,x>=33-x>=0,x同时成立则x=3所以x=27原式=-2/(3√5)-2/5=-2√5/15-2/5

解:根号下y除以x的三次方,这样化简:(x≠0)

X的二分之三次方

A除B=B除以Ay=(√x)/(√x)=x^(1/2)÷x^(1/3)=x^(1/6)y'=(1/6)x^(-5/6)所以,y'=(1/6)x^(-5/6)

√(x-2)/(x-2)/√x/(x-2x)=√(x-2)/(x-2)*(√(x)/√x)=1*√x=√x

分母是x开三次方吧?lim (1-x)/[x^(1/3)-1]分子:1-x=(1-x)(1+x+x)然后分子分母同乘以[x^(2/3)+x^(1/3)+1]此时分子变成:(1-x)(1+x+x)[x^(2/3)+x^(1/3)+1]分母变成:[x^(1/3)-1][x^(2/3)+x^(

解:∵x>0,>0. ∴3√xy÷4√x=3/4 x√y.