a) A = [-11; 4], B = (2; 8]
- A \ B = [-11; 2]
- B \ A = (4; 8]
- (A \ B) ∪ (B \ A) = [-11; 2] ∪ (4; 8]
б) A = [2; 7], B = [8; 12]
- A \ B = [2; 7]
- B \ A = [8; 12]
- (A \ B) ∪ (B \ A) = [2; 7] ∪ [8; 12]
в) А = (-∞; 5], B = (1; +∞)
- A \ B = (-∞; 1]
- B \ A = (5; +∞)
- (A \ B) ∪ (B \ A) = (-∞; 1] ∪ (5; +∞)