These are recurrence relations for Computer Science exactly as the question is given to me$.$

Solve the following recurrence relation:

$a_n-4a_{n-1}=3a_{n-2},$ for $n1.a_0=5,a_1=2$

: Solve the following recurrence relation:

$a_n=a_{n-1}+3,$ for $n2.a_1=2$