Are you saying that my answer in post #3 is wrong? (Sorry for being so slow; I'm self studying Linear Algebra from Strang and he isn't very clear most of the time.)
Are you saying that my answer in post #3 is wrong? (Sorry for being so slow; I'm self studying Linear Algebra from Strang and he isn't very clear most of the time.)
Your answer is right. I also provided the matrix U , that is