2 Matrix: A rectangular arrangement of data into rows and columns, identified by capital letters. Matrix Dimensions: Number of rows, m, by the number of columns, n. Read as “m by n” matrix. Also known as the order of a matrix.RBC (ROWS BY COLUMNS)
17 Determinant of a Matrix A special number that can be calculated from the matrix.It tells us things about the matrix that are useful in systems of linear equations, in calculus, and moreThe symbol for determinant is two vertical lines either side
27 For matrices, there is no such thing as division For matrices, there is no such thing as division. You can add, subtract, and multiple matrices, but you cannot divide them.There is a related concept called inversion
32 Multiplying InverseWhen you Multiply a matrix A times it’s inverse, the Product is the Identity Matrix. Identity Matrix is a square matrix where the top left to Bottom right diagonal are all ones, and everything else is a zero
33 Determine if the following matrices are inverses. 1. 2.
36 Use your calculator! 2nd Matrix Edit Put in your matrix 2nd Matrix NAMEGet your matrixX-1
37 The inverse of a matrix can be used when solving matrix equations The inverse of a matrix can be used when solving matrix equations. For Matrices A and B, we can find Matrix X: IF AX = B THEN X = A-1B