Answer:
a₈₈ = - 431
Step-by-step explanation:
The nth term of an arithmetic sequence is
[tex]a_{n}[/tex] = a₁ + (n - 1)d
where a₁ is the first term and d the common difference
here a₁ = 4 and d = a₂ - a₁ = - 1 - 4 = - 5 , then
a₈₈ = 4 + (87 × - 5) = 4 + (- 435) = 4 - 435 = - 431
