Question: 1.4.6 Let S = (-co, +m). Show that the class of all finite unions of intervals of the form [a, b ] , (a, b

1.4.6 Let S = (-co, +m). Show that the class of all finite unions of intervals of the form [a, b ] ,

(a, b ) , [a, b), and

(a, b], with possibly infinite a or b (intervals of the form [a, co); etc.) forms a field.

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