a) A = {x: x ∈ C ʌ |x| = 4} A = { b) B = {x: x ∈ N ʌ x do potęgi 2 ≤ 4} B = { c) C = {x: x ∈ C ʌ x do potęgi 2 ≤ 16} C = { d) D = {x: x ∈ N ʌ 0 ≤ x ≤ 10} D = { e) E = {x: x ∈ R ʌ x do potęgi 2 ≤ 0} E = { f) F = {x: x ∈ N ʌ x do potęgi 2 - 1 < 0} F = { g) G = {x: x ∈ W ʌ x do potęgi 2 = 1,63} G = { i) I = {x: x ∈ NW ʌ x do potęgi 2 = 10} I = { j) J = {x: x ∈ R ʌ x do potęgi 2 ≤ 0} J =