Step-by-step explanation:
a1 = 27
r = -9/27 = -⅓
the formula :
an = a1. r^(n-1)
= 27. (-⅓)^(n-1)
= 3³(-3`¹)^(n-1)
= 3³(-3)^(1-n)
Order of Operations = PEMDAS
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
- two consecutive integers
<u>-4 and -3</u>
The answer to this question is D.
