Question

D=4,a1=3 find nth term

Answer 1

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

nth term is -1 + 4n or 4n - 1

Answer 2

Obviously this is an arithmetic sequence whose common difference, d , is 4.

Answer 3

You're welcome.

Answer 4

Thanks for all of your help