Question:

Let A be an upper (lower) triangular matrix. a) Show that A

Last updated: 8/6/2022

Let A be an upper (lower) triangular matrix. a) Show that A

Let A be an upper (lower) triangular matrix. a) Show that A is invertible if and only if the diagonal entries of A are all nonzero. b) Show that if A is invertible, then A¹ is also an upper (lower) triangular matrix.