Alexander now stands in 10th place on the school career scoring list with 1,546 points, passing Brian Sand (1,540). Also, his 83 career wins passed Mike Felt for most in school history.
Nebraska-Omaha (8-14, 2-8) led 42-41 with 12:31 remaining, but 3-pointers from Jacobson and Paul Miller bookended a 14-6 scoring spurt over the next 5:54 which gave the Bison the lead for good.
Marcus Tyus scored 21 for the Mavericks.
North Dakota State holds a commanding 45-28 lead in the series all-time, and is 7-0 against the Mavericks since they moved to Division I in 2012.