they are pretty simple...
EX. 1) list the first five terms of the recursively defined sequence
{s1 = 50
{sn = sn-1 + 2 all devided by 2.
EX. 2) write a recursive formula for the sequence 1,1.3, 1.6, 1.9, 2.2, 2.5, ...
EX. 3) the first two terms in the "lucas sequence" are 1 and 3. each...