Algebra-1

Let's denote the first term as a₁. Then we have:

a₁ = -1

a₂ = a₁ * (-3) = -1 * (-3) = 3

a₃ = a₂ * (-3) = 3 * (-3) = -9

a₄ = a₃ * (-3) = -9 * (-3) = 27

From this pattern, we can see that each term is obtained by multiplying the previous term by -3. So, the formula for the nth term (a_n