Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 159

Negation
Negating a matrix returns a matrix in which the sign of every element is changed.
L matrix
abs(
(absolute value, menu) returns a matrix containing the absolute value of each
abs( MATH NUM
element of .
matrix
abs(matrix)
round(
( menu) returns a matrix. It rounds every element in to # ( 9). If
round( MATH NUM matrix decimals
is omitted, the elements are rounded to 10 digits.
#decimals
[, ]
round(matrix #decimals )
Inverse
function (œ) or › L
L1
Use the to invert a matrix. must be square. The determinant cannot
1 matrice
equal zero.
Chapter 10: Matrices 152