Question

Dado a P.G (3,12,48...) Qual o s8?

Answer 1

Sn = a1 (q^n -1) / q-1

S8 = 3 * (4^8 - 1) / 4 - 1
S8 = 3 * (65536 - 1) / 3
S8 = 3 * 65535 / 3
S8 = 65 535