solve for question below

Question

solve for the question below

For the given arithmetic sequence,

(a) Identify the common difference, d.

(b) Write a recursive formula.

(c) Write a non-recursive formula for the nth term, a_n

(d) Find the 20th and 50th terms.

1.  7, 11, 15, 19, 23, ...
2. 5, -1, -7, -13, -19, ...
3. 3/2, 4, 13/2, 9, 23/2

Answer 1