Question 19635
find element a23 of matrix A if A=
 2 -3  4
 5  0 -6
 7  2 -8
MATRIX ELEMENTS ARE THE NUMBERS IN THE MATRIX..EACH NUMBER IS GIVEN AN ADDRESS.
WE CALL THE MATRIX AS AN ARRAY OF ROWS AND COLUMNS
ROW 1 IS HAVING 2,-3,4
ROW 2 IS HAVING 5,0,-6
ROW 3 IS HAVIN 7,2,-8
SIMILARLY COLUMN 1 IS HAVING 2,5,7 ETC...NOW WITH THIS NOMENCLATURE, LIKE WE GIVE OUR HOUSE ADDRESS AS INTERSECTION OF A CROSS ROAD AND MAIN ROAD,HERE WE USE INTERSECTION OF ROW NO.?  AND  COLUMN NO.??.TO GIVE THE ADDRESS.....A23 MEANS THE ELEMENT OR NUMBER IN THIS CASE IN ROW 2 AND COLUMN 3...WHICH IS -6