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

asked Oct 8, 2022 166k views

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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

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Answer: B: 1024

Explanation:

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

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