Question

A=[1 1 2, 1 2 3,0 -1 -1] find rank of matrix A,
​

Answer 1

Answer:

  The last equivalent matrix is in the echelon form. It has three non-zero rows.  ∴ ρ(A) = 3;  here A is of order 3 × 4

Answer 2

Answer:

From which subject and class