The recursive formula for a geometric sequence is:

Mathematics

1 answer:

kkurt [141]2 years ago

5 0

9514 1404 393

Answer:

C. 45

Step-by-step explanation:

Apparently, your recursive definition is ...

$a_1=5\\a_n=a_{n-1}\cdot3$

Each term is 3 times the previous one, so the sequence starts ...

5, 15, 45, 135, 405, ...

The 3rd term is 45.

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Agenda:
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May be there is an operator missing in the first function, h(x). I will solve this in two ways, 1) as if the h(x) = 5x and 2) as if h(x) = 5 + x

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