Answer:
see explanation
Step-by-step explanation:
This is an arithmetic sequence with n th term
• [tex]a_{n}[/tex] = a + (n - 1)d
where a is the first term and d the common difference
d = 2 - 7 = - 3 - 2 = - 5 and a = 7, hence
[tex]a_{n}[/tex] = 7 - 5(n - 1) = 7 - 5n + 5 = 12 - 5n
[tex]a_{n}[/tex] = 12 - 5n ← n th term formula
