Question

Find an explicit rule for the nth term of the sequence.

-4, -8, -16, -32, ...
Select one:
a. an = -4 • 2n - 1
b. an = 2 • -4n + 1
c. an = 2 • -4n
d. an = -4 • 2n

Answer 1

an = 2 ● (-4)n-1

Explanation:

Just got it right

Answer 2

Answer: -4 . 2ⁿ⁻¹

Step-by-step explanation: This is a geometric progression

the nth term is given by arⁿ⁻¹

a = the first term of the sequence

r = common ratio

n= number of terms

for this sequence

a = -4

r = -8/-4 = 2

nth term, an = -4 . 2ⁿ⁻¹