Matrix has order and is an identity matrix such that

MATHEMATICS · Single correct · AP · AP Precalculus · Functions with Parameters, Vectors, and Matrices · Functions with Parameters, Vectors, and Matrices

Problem

Matrix

A

has order

m \times 6

and

I

is an identity matrix such that

AI = A

. What is the order of

I

? (a)

m \times m

(b)

6 \times m

(c)

6 \times 6

(d)

m \times 6

Related theory

Matrices
Matrix operations
Algebra
Order of a matrix

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