Again, a linear combination is simply sums of numbers times the objects, in this case the columns of the matrix. That is, if the matrix isWrite the system in a column picture. Show that the three columns on the left lie in the same plane by expressing the third column as a combination of the first two. WHat are all the solutions (u,v,w) if the column on the right side of the equation is changed to (0,0,0)?
then a "linear combination" of the columns are
for number x, y, and z.
I am concerned about your apparent ignorance of basic definitions. Whoever gave you these exercises clearly expects you to know what a "linear combination" is!