计算：xy(x^-1+y^-1)x^-1-y^-1/ [(x^-2)-(y^-2)]
来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/20 12:49:38
计算：xy(x^-1+y^-1)x^-1-y^-1/[(x^-2)-(y^-2)]计算：xy(x^-1+y^-1)x^-1-y^-1/[(x^-2)-(y^-2)]计算：xy(x^-1+y^-1)x^
计算：xy(x^-1+y^-1)x^-1-y^-1/ [(x^-2)-(y^-2)]
计算：xy(x^-1+y^-1)
x^-1-y^-1/ [(x^-2)-(y^-2)]
计算：xy(x^-1+y^-1)x^-1-y^-1/ [(x^-2)-(y^-2)]
xy(x^-1+y^-1)=x+y
x^-1-y^-1/ [(x^-2)-(y^-2)]
=1/(1/x+1/y)
=xy/(x+y)
哇 下学这么久了 都忘了
xy(x^-1+y^-1)
=xy(1/x+1/y)
=xy[(y+x)/xy]
=(x+y)
x^-1-y^-1/ [(x^-2)-(y^-2)]
=[x^(-1)-y^(-1)]/[x^(-1)+y^(-1)][(x^(-1)-y^(-1)]
=1/[x^(-1)+y^(-1)]
=1/(1/x+1/y)
=xy/(x+y)
计算3xy[2xy-x(y-2)+x-1]
xy[（x^-1)+(y^-1)] 计算
计算：(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
计算：1-2x+x^2/x-x^3*xy+x^2y/x-x^2
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
xy-1+x-y
计算(3x^3y-x^2y+1/2xy)÷(-1/2xy）
计算:(4xy(x-y)^-1+(x(y^-1)-(x^-1)y)/((x^-1)+(y^-1)))*(x+y)^-2
计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy
计算：xy(x^-1+y^-1)x^-1-y^-1/ [(x^-2)-(y^-2)]
计算:(x-2y)(1+x+2y+4y^2+2xy+x^2)
计算（3x^2y-xy^2+1/2xy）/（-1/2xy）
计算（-3分之1xy²）²×[xy（2x-y）+xy²]=
计算=(-3x²y)/(1/3xy²)
计算（-3x^2y)×（1/3xy^2)
计算：（-3x^2y)(1/3xy^2)=?
计算2(-x^4 y)²×(-1/4xy³)
计算：（-3x^y)(1/3xy^2)=?