Answer:
[tex]\sf \bold{ 1 * (-3)^{n-1}}[/tex]
Explanation:
first term, a₁ = 1
difference between the terms: -3
- used geometric formula : [tex]\bold{\sf a_1 * (r)^{n-1}}[/tex]
where "a₁ is first term" and "r refers to common difference"
- formula for this nth term: [tex]\sf \bold{ 1 * (-3)^{n-1}}[/tex]
