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 $3 \times m$ and $3 \times n$ , respectively, and $m = n$ , then the order of matrix (5A − 2B) is:

Smart Achievers · Accepted Answer

(4)

Ans. $3 \times n$

Explanation:

$A_{3 \times m}$ and $B_{3 \times n}$ are two matrices. If $m = n$ , then A and B have the same order as $3 \times n$ each, so the order of (5A − 2B) should also be $3 \times n$ .

Solution

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 (5A − 2B) is:

1 $m \times 3$

2 $3 \times 3$

3 $m \times n$

4 $3 \times n$

Ans.
(4)

Ans. $3 \times n$

Explanation:

$A_{3 \times m}$ and $B_{3 \times n}$ are two matrices. If $m = n$ , then A and B have the same order as $3 \times n$ each, so the order of (5A − 2B) should also be $3 \times n$ .

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Solution

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:

1 m×3

2 3×3

3 m×n

4 3×n

Ans. (4) Ans. 3×n Explanation: A3×m and B3×n are two matrices. If m=n, then A and B have the same order as 3×n each, so the order of (5A − 2B) should also be 3×n.