If row 111 is (1,2)(1, 2)(1,2) and row 222 is (3,6)(3, 6)(3,6), are the rows linearly independent?
Yes, because 1≠31 \neq 31=3.
No, because row 2=3×2 = 3 \times2=3× row 111.
Yes, because the determinant is 000.
No, because they are vectors of length 2.