翻译一下If rsuv = 1 and rsum = 0, which of the following must be

If xy=x+y and y> 2,which of the following must be true about if(m-1)(1-k)=0,which of the following can be true?sat数学题 which of the following must be disclosed on the face of the If k is a positive integer,which of the following must repre which of the following can be shammed? If a (n) = a(n-1) / a(n-1)-1,a (1)=8,which of the following in triangle ABC,AB=AC=2.WHICH of the following could be the Which of the following numbers if expressed in decimal form, which of the following is ture?翻译并说明为什么用which of 和following Polyurethanes can be which of the following (more than one): Which of the following can not be erten? which of the following determiners can be placed before both