What is the value of the fourth term in a geometric sequence for which a1 = 30 and r = 1/2?.

Question

Mathematics

Charisma

17 June, 06:11

What is the value of the fourth term in a geometric sequence for which a1 = 30 and r = 1/2?.

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Answers (1)

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Davin Andersen · Answer 1

For a Geometric sequence:

a n = a (n-1) * r

In this case: a 1 = 30

a 2 = 30 * 1/2 = 15

a 3 = 15 * 1/2 = 7.5

a 4 = 7.5 * 1/2 = 3.75 = 3 3/4

Answer: The value of the fourth term is 3.75 or 3 3/4.