Question

Calcule a soma dos infinitos termos da PG (12 + 4 + 4/3 + ... )

Answer 1

no passo da tartaruga:

s = a1 / 1 -q. => q=4/12= 1/3

s = 12 / 1 -1/3. => 1 -1/3= 3/3 -1/3=2/3

s = 12 / 2/3

s = 12 × 3/2

s = 36/2

s = 18