If A is 4x2 matrix, and b is 2x3 matrix, then BA is a 4x3 matrix?
2007-05-12 09:17:49 · 5 answers · asked by Mike L 1 in Science & Mathematics ➔ Mathematics
no, AB would be a 4x3 matrix (and not BA). Remember that when you multiply matrices, the number of columns of the first matrix has to equal the number of rows of the second matrix:
A*B: (4x2)(2x3) = 4x3
B*A: (2x3)(4x2) = not able to perform matrix multiplication
2007-05-12 09:24:29 · answer #1 · answered by damico105 3 · 1⤊ 0⤋
You can't multiply a 4x2 matrix by a 2x3. The matrix B must have dimensions 2x4 to be multiplied with A.
2007-05-12 16:23:43 · answer #2 · answered by factor_of_2 3 · 0⤊ 0⤋
because it is the number of rows of the fist matrix and number of columns of the second
also 2 x 3 matrix multiplied to the lhs of a 4 x 3 matrix does not make sense
2007-05-12 16:22:35 · answer #3 · answered by Anonymous · 0⤊ 0⤋
AB is a 4x3 matrix.
BA does not exist.
The order of matrix multiplication is important
2007-05-12 16:34:30 · answer #4 · answered by Dr D 7 · 0⤊ 0⤋
No, the best it can be is a 2x2 matrix - quickly sketch one on top of the other.
2007-05-12 16:58:34 · answer #5 · answered by Mike1942f 7 · 0⤊ 0⤋