The ultimate matrix (in decreased row echelon kind) has two non-zero rows and so the rank of matrix A is two.
（尤指并排站立的）行，列，排 The front rank of your riot squad lifted their shields. 前排的防暴队员举起了盾牌。
A matrix is said to acquire complete rank if its rank equals the most important achievable for a matrix of a similar Proportions, that is the lesser of the volume of rows and columns.
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