[Solved] 18.06 Exercise 3- multiplication and inverse matrices

multiplication and inverse matrices

Problem 3.1: Add AB to AC and compare with A(B + C) :

A B C

Problem 3.2: (2.5 #24. Introduction to Linear Algebra: Strang) Use GaussJordan elimination on [U I] to find the upper triangular U⁻¹ :

UU⁻¹ = I .