Need solution for RD Sharma maths class 12 chapter 4 Algebra of Matrices exercise Fill in the blank question 7
B is an n x m matrix.
Use the basic concept of matrix order.
A is an m x n matrix and AB and BA are defined.
Multiplication is possible, if first matrix has same number of columns as number of rows in second matrix.
AB is defined so number of rows in B is n
BA is defined so number of columns in B is m
Hence order of matrix B is
n x m