Diketahui 27+9+3+1+....=x nilai x adalah... Jawab plis:(((((

Kelas 8 Matematika
Bab Barisan dan Deret Bilangan

r = U2/U1
r = 9/27
r = 1/3

S~ = a/(1 - r)
S~ = 27 / (3/3 - 1/3)
S~ = 27 / (2/3)
S~ = 40 1/2