Answer:
-4920.75 or 18
Step-by-step explanation:
I'm not quite sure if this is correct because I got two diffrent soultions for a.
In a1=3 I got a=3
In a8= -6561 I got a= -820.125
So i plugged my two solutions in to find a6
I got
18
or
-4920.75
That doesn't really seem correct, but I tried!!
