Question

Os 4 primeiro termo da P.G a1=0,5 q=-0,2

Answer 1

a1=0.5
a2=-0.2×0.5=-0.1
a3=-0.2×(-0.1)=0.02
a4=-0.2×0.02=-0.004

PG:

{0.5, -0.1, 0.02, -0.004, ...}