Solve to find a combination of the columns that equals b: Triangular system u v w = b1 v
Chapter 1, Problem 1.2.2(choose chapter or problem)
Solve to find a combination of the columns that equals b: Triangular system u v w = b1 v + w = b2 w = b3
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer