Question

Calcule a soma dos infinitos termos da PG (45, 15, 5,...)

Answer 1

Resposta:

Explicação passo-a-passo:

Sn=a1/(1-q)

a1=45

q=15/45=1/3

q=5/15=1/3

Sn=45/(1-1/3)

Sn=45/(3/3-1/3)

Sn=45/2/3

Sn=45.3/2

Sn=135/2

Sn=67,5