Course Specifications
Faculty of Commerce and Business studies
Course Specifications
Bachelor of Commerce and Business
Administration
General
General
:Program (s) on which the course is given
:Major or minor element of program
:Department offering the pro
Inverse of a square Matrix by determinants (A1):
(1) Find : non zero
(2) Find Cofactor of Matrix A [Aij] by Cancel Row and
Column with signs +

+
(3) Find ad joint of Matrix A (adj. A) by Transpose
Cofactor of Matrix
(4) A =
1
1
[ adj. A ]
N.B: check
A
Matrix Algebra:
CHAPTER ( 4 )
MATRICES
A matrix is a square or a rectangular array of
real numbers which is enclosed in large brackets [ ]
or ( ).
If a matrix has (m) Rows and (n) Columns then
it is said to be the size (m x n).
Types of Matrices:
(1) Rect
Marginal Analysis
Marginal Cost
=
C (x)
=
dc
dx
Marginal Revenue
=
R \ (x)
=
dR
dx
\
Ex. The Revenue equation R = 10 x 0.01 x2
Determine the Marginal Revenue when x = 300.
Sol.:
R = 10 x 0.01 x2
Marginal R :
R\ = 10 0.02 x
R\ (300) = 10 0.02 (300) =
4
Ex.