Matrix Operations

Front

What is a Matrix?

Back

A set of numbers arranged in rows and columns.

Front

What must be true in order to MULTIPLY two matrices?

Back

The number of columns of the 1st matrix must equal the number of rows of the 2nd matrix.

Front

What is the name of each entry of a matrix?

Back

Element

Front

What are the dimensions of a 2x3 matrix?

Back

2 rows and 3 columns.

Front

Can a 2x3 matrix be multiplied by a 2x5 matrix?

Back

No, the product is undefined.

Front

What is the product of a 2x3 matrix and a 3x2 matrix?

Back

A 2x2 matrix.

Front

What is the product of a 2x3 matrix and a 3x5 matrix?

Back

A 2x5 matrix.

Front

If matrix A is 2x3 and matrix B is 3x4, what is the dimension of the product AB?

Back

2x4.

Front

What is the identity matrix for a 2x2 matrix?

Back

[[1, 0], [0, 1]]

Front

What is the zero matrix?

Back

A matrix in which all entries are zero.