A geometric sequence is defined recursively by an = 4an-1. The 10th term of the sequence is a10 = 3.5. What is a13?

Mark Rosales

Mark Rosales

Answered question

2022-11-19

A geometric sequence is defined recursively by an = 4an-1. The 10th term of the sequence is a10 = 3.5. What is a13?

Answer & Explanation

Patrick Arnold

Patrick Arnold

Beginner2022-11-20Added 21 answers

Assuming the "givens" are:
a n = 4 a n - 1
a 10 = 3.5
a 11 = 4 a 10 = 4 3.5 = 14
a 12 = 4 a 11 = 4 14 = 56
a 13 = 4 a 12 = 4 56 = 224

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