Mathematics

Mathematics

Problem

Let

A

be a

3\times k

matrix,

B

a

k\times 4

matrix and

C

a

4\times n

matrix, where

k

and

n

are positive integers. For which value of

n

is the product

ABC

defined and also a square matrix? a)

n = 4

b)

n = 3

c) Any positive integer

n

d)

n = k

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