Write an expression for the most apparent nth term of the sequence. Assume n begins with 1.

Question

3,7,11,15,19

My answer was an= 3 +4n but this wrong.

Answer 1

term(n) = a + (n-1)d
= 3 + 4(n-1)
= 3 + 4n - 4
= 4n - 1

check:
term(3) = 12-1 = 11, checks!

Answer 2

Thank You