And don't !

write a recursive formula for the arithmetic sequence below. what is the value of the 8th term? 1, 5, 9, 13, . . a. a (n) = a(n - 1) - 4; -27 b. a (n) = 4a(n - 1); 29 c. a (n) = a(n - 1) + 4; 29 d. a (n) = -4a(n - 1); -27