The first term of a geometric sequence is 3 and the common ratio is -2, what is the 12th term?

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The first term of a geometric sequence is 3 and the common ratio is -2, what is the 12th term?

Guest Apr 9, 2015

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Best Answer

+129215

+5

The nth term is given by :

3 (-2)^n-1

So....the 12th term is

3(-2)^12-1 =

3(-2)¹¹ =

-6144

CPhill Apr 9, 2015

1⁺⁰ Answers

+129215

+5

Best Answer

The nth term is given by :

3 (-2)^n-1

So....the 12th term is

3(-2)^12-1 =

3(-2)¹¹ =

-6144

CPhill Apr 9, 2015

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