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

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3×3

4×3

n×3

3×n

answer is D.

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Detailed Solution

A3xm and B3xn are two matrices. If m=n, then A and B have same orders of 3 x n each, sothe order of (5A-2B) should be same as 3xn.

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