1.7 D: Sequences and series

A sequence $a_1, a_2, a_3, \dots\,$ is defined by

\begin{aligned}a_1 &= 1, a_2 = 6 \\a_n &= a_{n-1} + a_{n-2}, \quad n \geq 3\end{aligned}

Find $a_3, a_4\,$ and $a_5$ .

[3]

A sequence $a_1, a_2, a_3, \dots\,$ is defined by

\begin{aligned}a_1 &= 1, a_2 = 6 \\a_n &= a_{n-1} + a_{n-2}, \quad n \geq 3\end{aligned}

Find $a_3, a_4\,$ and $a_5$ .

[3]

1.7 D: Sequences and series Questions