Using cofactors, find the determinant and the inverse of the matrix A = 1 2 3 2 1 0 0 2 3 .

S343 Section 3.6 Notes- Variation of Parameters 10-11-16 Variation of parameters- general method, can be applied in principle to any equation; no detailed assumptions about form of solution required ′′ ′ Consider + + = () where ,, continuous o Assume general homogeneous solution = + 1 1 ) 2 2( ) o Replace constants ,1 w2th functions 1 re2pectively; determine functions such that = 1 1 (2) sat2sfies original nonhomogeneous ODE ′ ′( ) ( ) ( ) ( ) ′( ) ( ) ( ) ( )