当xy<0时,化简 根号下(xy²)
当xy<0时,化简 根号下(xy²)
当xy<0时,化简x根号下负x的二次方分之y
根号下(x^2-2xy+y^2/xy)化简 x>y>0
xy<0,则化简根号下x的平方y的结果是____,当a>0时,化简根号下-a×m的三次方
化简:[(x×根号x+x×根号y)/(xy-y²)]-[(x+根号下xy+y)/(x×根号x-y×根号y)]
计算:(根号下x+xy-根号下xy)(根号下y+y²+y)(x>0,y>0);
当xy小于0时,化简根号xy的平方等于多少
根号下(x^2-2xy+y^2/xy)化简 (x>y>0)
lim (x,y)->(0,0) xy/[根号下(xy+1)]-1的值为
lim (x,y)->(0,0) xy/[根号下(xy+1)]-1的值为
求极限((1-根号下x^2+1)/x^3y^2)sin(xy),当x,y趋于0时
当x=根号6,y=根号2时,求代数式xy分之x²-y²-xy-x²分之xy-y²