jumlah deret geometri tak hingga 5+ 2 1/2 + 1 1/4 - 5/8 + ...

Kelas 8 Matematika
Bab Barisan dan Deret Bilangan

r = U2 : U1
r = (2 1/2) : 5
r = (5/2) x 1/5
r = 1/2

S∞ = a / (1 - r)
S∞ = 5 / (2/2 - 1/2)
S∞ = 5 / (1/2)
S∞ = 10