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Find the 10th term of the geometric sequence 9, -18, 36, …?

2 Answers

2 votes

Answer:

Explanation:

From here, you plug in n = 10 to find the tenth terma = 9 = first term

r = -2 = common ratio

We multiply each term by -2 to generate the next term

The nth term for this geometric sequence is a*(r)^(n-1) which becomes 9(-2)^(n-1)

If you tried plugging in say n = 2, you should find that,

9(-2)^(n-1)

9(-2)^(2-1)

9(-2)^1

9(-2)

-18

9(-2)^(n-1)

9(-2)^(10-1)

9(-2)^9

9(-512)

-4608

User MiltoxBeyond
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8.4k points
6 votes

Answer:

-4608

Explanation:

User Peter Ericson
by
8.4k points

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