We have sequence equation [tex]a_n=a(n-1)+4[/tex].
In this case n is a natural number (1, 2, 3, ...).
So start inserting and computing value of [tex]a_n[/tex] given that you know the value of n and a.
[tex]a_1=2(1-1)+4=4[/tex] (first term)
[tex]
a_2=2(2-1)+4=6 \\
a_3=2(3-1)+4=8 \\
a_4=2(4-1)+4=10
[/tex]
Hope this helps.
