Question

What is the 9th term of the geometric sequence with this explicit formula?

an= 4.(-2)(n-1)
A. -64
B. 1024
C. -2048
D. -1024
Algebra 1

Answer 1

Answer: B: 1024

Explanation:

`a_n=4*(-2)^(n-1)\\\\a_9=4*(-2)^(9-1)\\\\=4*(-2)^8\\\\=4*256\\\\=1024\\\\Answer\ B\\`