Question

用列举法表示下列集合(1){a｜0≤a＜5,a∈N}(2){(x,y)｜0≤x≤2,0≤y＜2,x,y∈Z}(3)“ma

Answer 1

(1)

{0,1,2,3,4}

(2)

{(0,0),(0,1),(1,0),(1,1),(2,0),(2,1)}

(3)

{m,a,t,h,e,i,c,s}