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11-04-2017
Mathematics

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The 4th term of a geometric sequence is 135, and the common ratio is 3. What is the first term of the sequence?

Respuesta :

11-04-2017

Assume the first term is a. The second term is 3a. The third term is 9a. The forth term is 27a.

27a=135 therefore a=135/27 = 5

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