What is the dimension of the matrix #[(6,-1,5),(-2,3,-4)]#?

1 Answer
Mar 3, 2017

This is a rectangular matrix of dimension #2xx3# (read as "two-by- three" matrix).


You can "read" the dimension by counting the number of rows and of columns expressing your dimension as:
#"number of rows"xx"number of columns"#

This dimension can be particularly useful when you multiply matrices because it will give you a definite condition to be able to operate the multiplication.