Diketahui deret geometri 2/3+2/9+2/27+2/81.....jumlah tak hingga deret tersebut adalah...

Kelas 10 Matematika
Bab Barisan dan Deret Bilangan

r = U2/U1
r = (2/9) / (2/3)
r = (2/9) . (3/2)
r = 1/3

S∞ = a/(1 - r)
S∞ = (2/3) / (3/3 - 1/3)
S∞ = (2/3) / (2/3)
S∞ = 1