I have an exercise which asks me to prove the following;
Let A be a non-singular matrix with transpose and inverse
Let b be a vector with transpose .
Prove that for =//not equal to//=
Thank you for replying romsek,
I had not noticed this yet, but it must be a typo in the exercise. This indeed makes it either or .
I am also dubious about the is not equal to -1 since obviously it is there to make the denominator be unequal to 0.
Therefore I suppose this is another typo which is supposed to be .
I will makes these two alterations in the original post.