Insert six G.M's between 8/27 and -81/16

Answer 1

(2/3)e3
3/2 e4

2/3(-3/2)=-1
3/2
-9/4
27/8
-81/16

(r=-3/2)
8/27***start
-4/9
2/3
-1
3/2
-9/4
27/8
-81/16 **end