Matrix Intro

Front

What are the dimensions of a matrix?

Back

The dimensions of a matrix are given in the format 'rows x columns'. For example, a 3x1 matrix has 3 rows and 1 column.

Front

How do you identify the dimensions of a matrix?

Back

To identify the dimensions of a matrix, count the number of rows and columns. The dimensions are expressed as 'number of rows x number of columns'.

Front

What is a row in a matrix?

Back

A row in a matrix is a horizontal line of elements. For example, in a 2x3 matrix, there are 2 rows.

Front

What is a column in a matrix?

Back

A column in a matrix is a vertical line of elements. For example, in a 2x3 matrix, there are 3 columns.

Front

How many rows are in a 7x3 matrix?

Back

A 7x3 matrix has 7 rows.

Front

How many columns are in a 7x3 matrix?

Back

A 7x3 matrix has 3 columns.

Front

What does the notation a_ij represent in a matrix?

Back

The notation a_ij represents the element located in the i-th row and j-th column of a matrix.

Front

If a₃₄ = -3, what does this mean?

Back

This means that the element in the 3rd row and 4th column of the matrix has a value of -3.

Front

If a₃₁ = 4, what does this mean?

Back

This means that the element in the 3rd row and 1st column of the matrix has a value of 4.

Front

What is the total number of elements in a 6x2 matrix?

Back

The total number of elements in a 6x2 matrix is 12 (6 rows x 2 columns).