Let the open interval J be the union of finite or denumerable family of open sets (that is, \(J = \cup_k G_k )\). Then \(\hspace{1.0cm}\).
—>> \(m(J) \leq \sum_{k} m(G_k )\)
\(m(J) \geq\sum_{k} m(G_k )\)
\(m(J) = \sum_{k} m(G_k )\)
\(m(J) > \sum_{k} m(G_k )\)
