tentukan deret tak hingga dari 1/2,1/4,1/8

Kelas 10 Matematika
Bab Barisan dan Deret Bilangan

1/2, 1/4, 1/8, ...

r = U2 : U1
r = (1/4) : (1/2)
r = (1/4) . (2/1)
r = 1/2

Un = 1/2ⁿ


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