How do I find the E U F and E U F

Question

E= {yIy≥3} 

F= {yly<8}

Write E U F and E n F using interval notation. If the set is empty, write Ø

Answer 1

E = [3, ∞) and F = (-∞, 8)

E U F = (-∞, ∞)

E ∩ F = [3,8)

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