Matrices

Front

What is a₂₃ in a matrix?

Back

The element located in the second row and third column of a matrix.

Front

Which sums can NOT be made from the following matrices: A, B, C, D?

Back

A+C cannot be summed because the matrices A and C must have the same dimensions.

Front

Which of the following products can NOT be made from these matrices: A, B, C, D?

Back

BC cannot be multiplied because the number of columns in B must equal the number of rows in C.

Front

If A is a 2 × 3 matrix, and B is a 3 × 4 matrix, how many columns does AB have?

Back

AB has 4 columns.

Front

What is the result of BA if A is a 2 × 3 matrix and B is a 3 × 4 matrix?

Back

BA is undefined because the number of columns in A does not equal the number of rows in B.

Front

Define a matrix.

Back

A matrix is a rectangular array of numbers arranged in rows and columns.

Front

What is the order of a matrix?

Back

The order of a matrix is defined by the number of rows and columns it contains, expressed as 'rows × columns'.

Front

What is a square matrix?

Back

A square matrix is a matrix with the same number of rows and columns.

Front

What is a zero matrix?

Back

A zero matrix is a matrix in which all the elements are zero.

Front

What is the identity matrix?

Back

An identity matrix is a square matrix with ones on the diagonal and zeros elsewhere.