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SAT® Subject Test in Math 1 & 2

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Moderate

Recursive Sequence

SATSTM-TK47X9

The Fibonacci sequence can be defined recursively as:

$${a}_{1}=1$$
$${a}_{2}=1$$
$${a}_{n}={a}_{n-1}+{a}_{n-2}$$

What is the $8\text{th}$ term of the sequence?

A

$8$

B

$13$

C

$21$

D

$34$

E

$55$