Question

I have no clue what this means?
Given the following matrix, what is the value of a11?
[8 11 13]
[17 0 6]
[4 16 18]

Answer 1

\[A_{rc}\]

Answer 2

r1, c1 is the entry in the first row first column

Answer 3

so it would be 11x8 ?

Answer 4

no, a11 is the number in row1 and column 1. in this case = 8. If it was a12 it would be 11...

Answer 5

a11 would be the entry in the 1st row 1st column: 8 is it

Answer 6

Oh, ok i see the way you wrote the first thing made me think you had to multiply them, thank you very much

Answer 7

the name of the matrix is a

it has r, rows and c, columns

a_rc defines which row and which column