In: Advanced Math
find the general solution of the following as
follows
Xn+2 = -2Xn+1 + 3Xn, x0=1 x1=2
a) find the 2x2 matrix that satisfies Yn+1=AYn
b) Find the characteristic value of A and its corresponding
characteristic vector
c) express X0 = (1 2)as a linear combination of characteristic
vector
d) find Yn
e) find Xn
Solution:
(a) In matrix form we can write the equation as
where
.
(b) The characteristic values of the coefficient matrix A are given by
To find the characteristic vector corresponding to
, we need to solve
is a characteristic vector corresponding to the characteristic
value
.
To find the characteristic vector corresponding to
, we need to solve
is a characteristic vector corresponding to the characteristic
value
(c) Now we have given that
Let
(d) Hence
\
(e) Hence