Section $8\mathrm{.}2$

Solve these recurrence relations

together with the initial conditions

given.

a$)a_n=a_{n-1}-12a_{n-2}$ for $n2,a_0=$

$2,a_1=1$

b$)a_n=2a_{n-1}-9a_{n-2}$ for $n2,a_0=$

$1,a_1=5$