E and F are sets of real numbers defined as follows.

Question

E= {w│w < 2}

F= {w│w ≤ 5}

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

Answer 1

E ∪ F = {w l w < 2 or w ≤ 5} = (-∞, 5]

E ∩ F + {w l w < 2 and w ≤ 5} = (-∞, 2)