- #1
cosmos42
- 21
- 1
Homework Statement
Suppose that AB = AC for matrices A, B, and C.
Is it true that B must equal C? Prove the result or find a counterexample.
Homework Equations
Properties of matrix multiplication
The Attempt at a Solution
AC = A(D + B) = AD + AB = 0 + AB = AB ? Can someone help me understand in plain english?