是英文的.在离散数学的课本里.还有关于such that 的否是什么啊.
是英文的.在离散数学的课本里.还有关于such that 的否是什么啊.
1.There exist a,b and c such that (a*b)*c≠a*(b*c)
2.For all integers a and b,there exist integers q and r such that b=qa+r
3.if n is an integer,n/(n+1) is not an integer.
注意第三个的答案不是
n is an integer and n/(n+1) is an integer.
因为老师给我判错了