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Given the following geometric sequence, find the 12th term: {2, -4, 8, ...}. -4096 2048 4096 -2048

Given the following geometric sequence, find the 12th term: {2, -4, 8, ...}. -4096 2048 4096 -2048
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3 votes
Given the following geometric sequence, find the 12th term: {2, -4, 8, ...}.

-4096
2048
4096
-2048

User Berzemus
by
7.3k points

2 Answers

3 votes

Answer: -4096

Explanation:

I just did the lesson

User Rinze
by
7.9k points
7 votes
Use formula: an = a1 * r^(n-1)
a1 = 2, r = -2
a12 = 2 * -2^(12-1)
a12 = 2 * -2^11
a12 = 2 * -2048
a12 = -4096

Solution: -4096
User Wayneio
by
8.0k points
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Given the following sequence, find the 12th term: {2, -4, 8,...} -4096 4096 2048 -2048
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