Answer:
The first five terms are
.
Step-by-step explanation:
The sequence is defined recursively by the formula
.
The first term of the sequence is given to be,
.
To find the next term, we substitute
in to the above formula to get,
.
.
But ![a_1=-1](https://tex.z-dn.net/?f=a_1%3D-1)
.
.
.
To find the third term, we substitute
in to the above formula to get,
.
.
But ![a_2=2](https://tex.z-dn.net/?f=a_2%3D2)
.
.
.
To find the fourth term, we substitute
in to the above formula to get,
.
.
But ![a_3=8](https://tex.z-dn.net/?f=a_3%3D8)
.
.
.
To find the fifth term, we substitute
in to the above formula to get,
.
.
But ![a_4=20](https://tex.z-dn.net/?f=a_4%3D20)
.
.
.
Therefore, the first five terms are
. The correct answer is C