matrix Inverse in maths and python
Inverse of the matrix in Python.
suppose we have a (2, 2) matrix.
>>> A = np.array([[2, 1], [3, 3]])
>>> A.I
matrix([[ 1. , -0.33333333],
[-1. , 0.66666667]])
Lets dive in
steps behind inverse. First of all 1 [2, 1]
(A[1,1]*A[2,2] - A[1,2]*A[2,1])[3, 3] ,
put the values e.g :- A[1, 1] = 2
1 = 1 [3 -1]
2*3 - 1*3 3 [-3 2]
#cross exchange the values of A[1, 1] and A[2, 2]
#and put the (-) sign on A[1, 2] and A[2, 1]
then divide ⇧⇧⇧ the matrix elements by 1/3
out[1]: matrix([[ 1. , -0.33333333],
[-1. , 0.66666667]])

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