Pre-Calculus Flashcard Matrix Basics

Front

What is a Matrix?

Back

A set of numbers arranged in rows and columns.

Front

What is the name of each entry of a matrix?

Back

Element.

Front

What must be true in order to ADD two matrices?

Back

The dimensions must be equal.

Front

What is the entry at f₄₂?

Back

99.

Front

Multiply the following matrices: 1, 8, 3; 11, 4, 5.

Back

-20, 15, -10; 30, -5, 0.

Front

What is the determinant of a 2x2 matrix?

Back

ad - bc, where the matrix is [[a, b], [c, d]].

Front

What is a scalar in matrix operations?

Back

A single number that can multiply a matrix.

Front

What is the identity matrix?

Back

A square matrix with 1's on the diagonal and 0's elsewhere.

Front

What is the transpose of a matrix?

Back

A new matrix whose rows are the columns of the original.

Front

What is a zero matrix?

Back

A matrix in which all entries are zero.