Question

I need the assistance of smarter beings than I..... I'm so lost.....

Answer 1

Answer:

$\sf \bold{ 1 * (-3)^{n-1}}$

Explanation:

first term, a₁ = 1

difference between the terms: -3

• used geometric formula : $\bold{\sf a_1 * (r)^{n-1}}$

where "a₁ is first term" and "r refers to common difference"

• formula for this nth term: $\sf \bold{ 1 * (-3)^{n-1}}$