If A and B are two matrices of the order 3 × m and 3 × n, respectively, and m = n, then the order of matrix (5A - 2B) is

Question

If A and B are two matrices of the order 3 × m and 3 × n, respectively, and m = n, then the order of matrix (5A - 2B) is (A) m×3 (B) 3× 3  (C) m× n (D) 3× n

Tardigrade Admin · Accepted Answer

A is of order 3 × m and B is of order 3 × n and m = n So, 5A - 2B is of order 3× m or 3× n

Q. If $A$ and $B$ are two matrices of the order $3 \times m$ and $3 \times n$ , respectively, and $m = n$ , then the order of matrix $(5 A - 2 B)$ is

$m \times 3$

$3 \times 3$

$m \times n$

$3 \times n$

$A$ is of order $3 \times m$ and $B$ is of order $3 \times n$ and $m = n$
So, $5 A - 2 B$ is of order $3 \times m$ or $3 \times n$

Q. If A and B are two matrices of the order 3×m and 3×n, respectively, and m=n, then the order of matrix (5A−2B) is

m×3

3×3

m×n

3×n