Math # 1 :

Chanpter # 5 Matrices
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1. if lamda is eigen value of A , 1/lamba is eigen value of A -1
2. There can be only 0 or 1 or many solutions to the equation Ax = B
3. for folowing equations to be true A need not be Identity matrix
A^2 = 0 ; A = A^-1 and A is invertible
4. Rank + Nullity = ??Dimension
5. If the column of the determinant is multiplied by K divide the determinant by K