Answer:
- 28
Step-by-step explanation:
There is a common difference d between consecutive terms, that is
d = 11 - 14 = 8 - 11 = 5 - 8 = - 3
This indicates the sequence is arithmetic with n th term
[tex]a_{n}[/tex] = a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = 14 and d = - 3 , thus
[tex]a_{15}[/tex] = 14 + (14 × - 3) = 14 - 42 = - 28
