linear algebra - How to find the image of a matrix ...
math.stackexchange.com › questions › 2000278Nov 05, 2016 · Definitions The image of a matrix A is the set of all vectors A v where v is a vector A can act upon. The span of a set v 1, v 2,..., v n is the set of all linear combinations of these vectors. For example, span (0,2) is the line (0,x) for all x real. And span { (0,1), (2,1)} is the whole plane.