Find the first five terms of the recursive sequence
an=-6an-1 where a1=4.5

4.5, -27, 162,-972, 5832

Step-by-step explanation:

The given recursive definition is,

This will form a geometric sequence with first term 4.5 and common ratio r=-6.

When n=2, we have:

When n=3, we get:

When n=4, we get:

When n=5, we get:

Therefore the first five terms are:

4.5, -27, 162,-972, 5832

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation: