sentences:  That is, the row space of "A" is the span of the vectors r1, ... , r"m".For example, if
  then the row vectors are r1 = (1, 0, 2) and r2 = (0, 1, 0).A linear combination of r1 and r2 is any vector of the form
  The set of all such vectors is the row space of "A".