Question

The inverse of a matrix is defined for

• A. Diagonal matrices
• B. Rectangular matrices
• C. Only square matrices
• D. all matrices

Answer 1

The correct option is C

Only square matrices

By Definition:

If A is a square matrix of order , and if there exists another square

matrix B of the same order , such that AB = BA = I, then B is called the

matrix of A and it is denoted by A^{– 1.} In that case A is said to be invertible.