Question

}                                               B = { x Î N /  x – 8 = 12 }

C = { x Î N / 117< x <  118}                                   D = { x Î N / 13 x < 14}

E = { x Î N / x + 453 = 453}                                   F = {x Î P  / x có 2 chữ số}

H = { 21;23;25;….;215}                                           M = { 57;60;63;…;423}

Answer 1

 

a: A={1;2;3;4;...;7}

b: B={20}

c: \(C=\varnothing\)

e: E={0}