What are the explicit equation and domain for an arithmetic sequence with a first term of 8 and a second term of 5?

a_n= 8 − 5(n − 1); all integers where n ≥ 1

[removed] a_n= 8 − 5(n − 1); all integers where n ≥ 0

[removed] a_n= 8 − 3(n − 1); all integers where n ≥ 1

[removed] a_n = 8 − 3(n − 1); all integers where n ≥ 0