Linear Algebra, Rank, Mathematics, Mathematics Education, Math.
solvability conditions are true. only if b3–2b_1 = 0 and b4–2b_2 = 0 can it be true. But if those two conditions are true, we are left with a single answer to solve our system. That is why we say that with a r = n (full column rank) matrix, we either have 0 or 1 solutions. 0 if one or more of our