Question

Instructions: Identify the type of sequence and write the recursive rule.

Answer 1

Case: Geometric sequence

Method:

Sequence: -1, -2, -4, -8, ...

1. Type: Geometric/ Exponential sequence

2. Since the common ratio is 2. The recursive function is:

`\begin{gathered} a_n=a_(n-1)\cdot r \\ a_n=a_(n-1)\cdot2 \end{gathered}`

3. The value of a1 (first term)

`a_1=-1`