Acutually Raoh if your still around, would you be so kind as to answer another question..(dont see the point in starting a new thread)
It's about linear transformations
L : R3 ->R2 be the linear transformation defined by
(x, y, z) = (x − y, y − z)
(i) Find the standard (2 × 3) matrix representation of L and compute L(1, 1, 1).
I know how to show something is a linear transformation but unsure how to start this question. Just the starting point is all i'm looking for. Maybe i've wasted too much of your time already...